Found the following HTML validation problems:
AsyncBackend.html:173:1 (AsyncBackend.Rd:163): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:193:1 (AsyncBackend.Rd:175): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:213:1 (AsyncBackend.Rd:187): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:219:1 (AsyncBackend.Rd:191): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:238:1 (AsyncBackend.Rd:202): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:244:1 (AsyncBackend.Rd:206): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:261:1 (AsyncBackend.Rd:215): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:267:1 (AsyncBackend.Rd:219): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:287:1 (AsyncBackend.Rd:231): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:293:1 (AsyncBackend.Rd:235): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:309:1 (AsyncBackend.Rd:245): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:326:1 (AsyncBackend.Rd:254): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:332:1 (AsyncBackend.Rd:258): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:345:1 (AsyncBackend.Rd:265): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:362:1 (AsyncBackend.Rd:274): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:368:1 (AsyncBackend.Rd:278): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:385:1 (AsyncBackend.Rd:289): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:404:1 (AsyncBackend.Rd:300): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:410:1 (AsyncBackend.Rd:304): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:427:1 (AsyncBackend.Rd:315): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:446:1 (AsyncBackend.Rd:326): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:452:1 (AsyncBackend.Rd:330): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:477:1 (AsyncBackend.Rd:349): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:496:1 (AsyncBackend.Rd:360): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:502:1 (AsyncBackend.Rd:364): Warning: <h5> anchor "Arguments" already defined
AsyncBackend.html:534:1 (AsyncBackend.Rd:387): Warning: <h5> anchor "Returns" already defined
AsyncBackend.html:554:1 (AsyncBackend.Rd:399): Warning: <h5> anchor "Usage" already defined
AsyncBackend.html:560:1 (AsyncBackend.Rd:403): Warning: <h5> anchor "Arguments" already defined
Backend.html:132:1 (Backend.Rd:83): Warning: <h5> anchor "Usage" already defined
BackendFactory.html:104:1 (BackendFactory.Rd:73): Warning: <h5> anchor "Usage" already defined
BackendFactory.html:110:1 (BackendFactory.Rd:77): Warning: <h5> anchor "Arguments" already defined
BackendService.html:109:1 (BackendService.Rd:50): Warning: <h5> anchor "Usage" already defined
BackendService.html:129:1 (BackendService.Rd:62): Warning: <h5> anchor "Returns" already defined
BackendService.html:149:1 (BackendService.Rd:74): Warning: <h5> anchor "Usage" already defined
BackendService.html:155:1 (BackendService.Rd:78): Warning: <h5> anchor "Returns" already defined
BackendService.html:174:1 (BackendService.Rd:89): Warning: <h5> anchor "Usage" already defined
BackendService.html:187:1 (BackendService.Rd:97): Warning: <h5> anchor "Returns" already defined
BackendService.html:204:1 (BackendService.Rd:106): Warning: <h5> anchor "Usage" already defined
BackendService.html:210:1 (BackendService.Rd:110): Warning: <h5> anchor "Returns" already defined
BackendService.html:230:1 (BackendService.Rd:122): Warning: <h5> anchor "Usage" already defined
BackendService.html:236:1 (BackendService.Rd:126): Warning: <h5> anchor "Arguments" already defined
BackendService.html:252:1 (BackendService.Rd:136): Warning: <h5> anchor "Returns" already defined
BackendService.html:269:1 (BackendService.Rd:145): Warning: <h5> anchor "Usage" already defined
BackendService.html:275:1 (BackendService.Rd:149): Warning: <h5> anchor "Arguments" already defined
BackendService.html:288:1 (BackendService.Rd:156): Warning: <h5> anchor "Returns" already defined
BackendService.html:305:1 (BackendService.Rd:165): Warning: <h5> anchor "Usage" already defined
BackendService.html:311:1 (BackendService.Rd:169): Warning: <h5> anchor "Arguments" already defined
BackendService.html:328:1 (BackendService.Rd:180): Warning: <h5> anchor "Returns" already defined
BackendService.html:347:1 (BackendService.Rd:191): Warning: <h5> anchor "Usage" already defined
BackendService.html:353:1 (BackendService.Rd:195): Warning: <h5> anchor "Arguments" already defined
BackendService.html:370:1 (BackendService.Rd:206): Warning: <h5> anchor "Returns" already defined
BackendService.html:389:1 (BackendService.Rd:217): Warning: <h5> anchor "Usage" already defined
BackendService.html:395:1 (BackendService.Rd:221): Warning: <h5> anchor "Arguments" already defined
BackendService.html:420:1 (BackendService.Rd:240): Warning: <h5> anchor "Returns" already defined
BackendService.html:439:1 (BackendService.Rd:251): Warning: <h5> anchor "Usage" already defined
BackendService.html:445:1 (BackendService.Rd:255): Warning: <h5> anchor "Arguments" already defined
BackendService.html:459:1 (BackendService.Rd:263): Warning: <h5> anchor "Details" already defined
BackendService.html:470:1 (BackendService.Rd:271): Warning: <h5> anchor "Returns" already defined
BackendService.html:490:1 (BackendService.Rd:283): Warning: <h5> anchor "Usage" already defined
BackendService.html:496:1 (BackendService.Rd:287): Warning: <h5> anchor "Arguments" already defined
Bar.html:108:1 (Bar.Rd:54): Warning: <h5> anchor "Usage" already defined
Bar.html:141:1 (Bar.Rd:76): Warning: <h5> anchor "Returns" already defined
Bar.html:159:1 (Bar.Rd:86): Warning: <h5> anchor "Usage" already defined
Bar.html:165:1 (Bar.Rd:90): Warning: <h5> anchor "Arguments" already defined
Bar.html:189:1 (Bar.Rd:104): Warning: <h5> anchor "Usage" already defined
Bar.html:205:1 (Bar.Rd:114): Warning: <h5> anchor "Usage" already defined
Bar.html:211:1 (Bar.Rd:118): Warning: <h5> anchor "Arguments" already defined
BarFactory.html:104:1 (BarFactory.Rd:72): Warning: <h5> anchor "Usage" already defined
BarFactory.html:110:1 (BarFactory.Rd:76): Warning: <h5> anchor "Arguments" already defined
BasicBar.html:93:1 (BasicBar.Rd:67): Warning: <h5> anchor "Usage" already defined
BasicBar.html:117:1 (BasicBar.Rd:83): Warning: <h5> anchor "Returns" already defined
BasicBar.html:137:1 (BasicBar.Rd:95): Warning: <h5> anchor "Usage" already defined
BasicBar.html:143:1 (BasicBar.Rd:99): Warning: <h5> anchor "Arguments" already defined
BasicBar.html:168:1 (BasicBar.Rd:114): Warning: <h5> anchor "Usage" already defined
BasicBar.html:184:1 (BasicBar.Rd:124): Warning: <h5> anchor "Usage" already defined
BasicBar.html:190:1 (BasicBar.Rd:128): Warning: <h5> anchor "Arguments" already defined
Context.html:142:1 (Context.Rd:134): Warning: <h5> anchor "Usage" already defined
Context.html:172:1 (Context.Rd:152): Warning: <h5> anchor "Usage" already defined
Context.html:178:1 (Context.Rd:156): Warning: <h5> anchor "Arguments" already defined
Context.html:192:1 (Context.Rd:164): Warning: <h5> anchor "Returns" already defined
Context.html:212:1 (Context.Rd:176): Warning: <h5> anchor "Usage" already defined
Context.html:218:1 (Context.Rd:180): Warning: <h5> anchor "Returns" already defined
Context.html:237:1 (Context.Rd:191): Warning: <h5> anchor "Usage" already defined
Context.html:243:1 (Context.Rd:195): Warning: <h5> anchor "Returns" already defined
Context.html:260:1 (Context.Rd:204): Warning: <h5> anchor "Usage" already defined
Context.html:266:1 (Context.Rd:208): Warning: <h5> anchor "Returns" already defined
Context.html:286:1 (Context.Rd:220): Warning: <h5> anchor "Usage" already defined
Context.html:292:1 (Context.Rd:224): Warning: <h5> anchor "Arguments" already defined
Context.html:308:1 (Context.Rd:234): Warning: <h5> anchor "Returns" already defined
Context.html:325:1 (Context.Rd:243): Warning: <h5> anchor "Usage" already defined
Context.html:331:1 (Context.Rd:247): Warning: <h5> anchor "Arguments" already defined
Context.html:344:1 (Context.Rd:254): Warning: <h5> anchor "Returns" already defined
Context.html:361:1 (Context.Rd:263): Warning: <h5> anchor "Usage" already defined
Context.html:367:1 (Context.Rd:267): Warning: <h5> anchor "Arguments" already defined
Context.html:384:1 (Context.Rd:278): Warning: <h5> anchor "Returns" already defined
Context.html:403:1 (Context.Rd:289): Warning: <h5> anchor "Usage" already defined
Context.html:409:1 (Context.Rd:293): Warning: <h5> anchor "Arguments" already defined
Context.html:426:1 (Context.Rd:304): Warning: <h5> anchor "Returns" already defined
Context.html:445:1 (Context.Rd:315): Warning: <h5> anchor "Usage" already defined
Context.html:451:1 (Context.Rd:319): Warning: <h5> anchor "Arguments" already defined
Context.html:476:1 (Context.Rd:338): Warning: <h5> anchor "Returns" already defined
Context.html:495:1 (Context.Rd:349): Warning: <h5> anchor "Usage" already defined
Context.html:501:1 (Context.Rd:353): Warning: <h5> anchor "Arguments" already defined
Context.html:527:1 (Context.Rd:370): Warning: <h5> anchor "Returns" already defined
Context.html:547:1 (Context.Rd:382): Warning: <h5> anchor "Usage" already defined
Context.html:553:1 (Context.Rd:386): Warning: <h5> anchor "Arguments" already defined
ContextFactory.html:103:1 (ContextFactory.Rd:70): Warning: <h5> anchor "Usage" already defined
ContextFactory.html:109:1 (ContextFactory.Rd:74): Warning: <h5> anchor "Arguments" already defined
ModernBar.html:93:1 (ModernBar.Rd:67): Warning: <h5> anchor "Usage" already defined
ModernBar.html:117:1 (ModernBar.Rd:83): Warning: <h5> anchor "Returns" already defined
ModernBar.html:138:1 (ModernBar.Rd:96): Warning: <h5> anchor "Usage" already defined
ModernBar.html:144:1 (ModernBar.Rd:100): Warning: <h5> anchor "Arguments" already defined
ModernBar.html:169:1 (ModernBar.Rd:115): Warning: <h5> anchor "Usage" already defined
ModernBar.html:185:1 (ModernBar.Rd:125): Warning: <h5> anchor "Usage" already defined
ModernBar.html:191:1 (ModernBar.Rd:129): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:163:1 (ProgressTrackingContext.Rd:180): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:169:1 (ProgressTrackingContext.Rd:184): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:192:1 (ProgressTrackingContext.Rd:197): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:198:1 (ProgressTrackingContext.Rd:201): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:224:1 (ProgressTrackingContext.Rd:217): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:230:1 (ProgressTrackingContext.Rd:221): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:267:1 (ProgressTrackingContext.Rd:244): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:273:1 (ProgressTrackingContext.Rd:248): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:290:1 (ProgressTrackingContext.Rd:259): Warning: <h5> anchor "Returns" already defined
ProgressTrackingContext.html:309:1 (ProgressTrackingContext.Rd:270): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:315:1 (ProgressTrackingContext.Rd:274): Warning: <h5> anchor "Arguments" already defined
ProgressTrackingContext.html:340:1 (ProgressTrackingContext.Rd:293): Warning: <h5> anchor "Returns" already defined
ProgressTrackingContext.html:359:1 (ProgressTrackingContext.Rd:304): Warning: <h5> anchor "Usage" already defined
ProgressTrackingContext.html:365:1 (ProgressTrackingContext.Rd:308): Warning: <h5> anchor "Arguments" already defined
SessionState.html:143:1 (SessionState.Rd:151): Warning: <h5> anchor "Usage" already defined
SessionState.html:149:1 (SessionState.Rd:155): Warning: <h5> anchor "Arguments" already defined
Specification.html:113:1 (Specification.Rd:97): Warning: <h5> anchor "Usage" already defined
Specification.html:119:1 (Specification.Rd:101): Warning: <h5> anchor "Arguments" already defined
Specification.html:133:1 (Specification.Rd:109): Warning: <h5> anchor "Details" already defined
Specification.html:154:1 (Specification.Rd:123): Warning: <h5> anchor "Usage" already defined
Specification.html:160:1 (Specification.Rd:127): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:116:1 (SyncBackend.Rd:119): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:136:1 (SyncBackend.Rd:131): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:156:1 (SyncBackend.Rd:143): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:162:1 (SyncBackend.Rd:147): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:181:1 (SyncBackend.Rd:158): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:187:1 (SyncBackend.Rd:162): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:204:1 (SyncBackend.Rd:171): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:210:1 (SyncBackend.Rd:175): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:230:1 (SyncBackend.Rd:187): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:236:1 (SyncBackend.Rd:191): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:252:1 (SyncBackend.Rd:201): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:269:1 (SyncBackend.Rd:210): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:275:1 (SyncBackend.Rd:214): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:288:1 (SyncBackend.Rd:221): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:305:1 (SyncBackend.Rd:230): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:311:1 (SyncBackend.Rd:234): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:328:1 (SyncBackend.Rd:245): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:347:1 (SyncBackend.Rd:256): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:353:1 (SyncBackend.Rd:260): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:370:1 (SyncBackend.Rd:271): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:389:1 (SyncBackend.Rd:282): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:395:1 (SyncBackend.Rd:286): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:420:1 (SyncBackend.Rd:305): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:439:1 (SyncBackend.Rd:316): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:445:1 (SyncBackend.Rd:320): Warning: <h5> anchor "Arguments" already defined
SyncBackend.html:469:1 (SyncBackend.Rd:335): Warning: <h5> anchor "Returns" already defined
SyncBackend.html:489:1 (SyncBackend.Rd:347): Warning: <h5> anchor "Usage" already defined
SyncBackend.html:495:1 (SyncBackend.Rd:351): Warning: <h5> anchor "Arguments" already defined
TaskState.html:164:1 (TaskState.Rd:157): Warning: <h5> anchor "Usage" already defined
TaskState.html:170:1 (TaskState.Rd:161): Warning: <h5> anchor "Arguments" already defined
UserApiConsumer.html:145:1 (UserApiConsumer.Rd:116): Warning: <h5> anchor "Usage" already defined
UserApiConsumer.html:151:1 (UserApiConsumer.Rd:120): Warning: <h5> anchor "Arguments" already defined
UserApiConsumer.html:172:1 (UserApiConsumer.Rd:135): Warning: <h5> anchor "Returns" already defined
UserApiConsumer.html:190:1 (UserApiConsumer.Rd:145): Warning: <h5> anchor "Usage" already defined
UserApiConsumer.html:196:1 (UserApiConsumer.Rd:149): Warning: <h5> anchor "Arguments" already defined
UserApiConsumer.html:225:1 (UserApiConsumer.Rd:172): Warning: <h5> anchor "Returns" already defined
UserApiConsumer.html:244:1 (UserApiConsumer.Rd:183): Warning: <h5> anchor "Usage" already defined
UserApiConsumer.html:250:1 (UserApiConsumer.Rd:187): Warning: <h5> anchor "Arguments" already defined