Found the following HTML validation problems:
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basismfd.html:136:1 (basismfd.Rd:97): Warning: <h5> anchor "Arguments" already defined
basismfd.html:166:1 (basismfd.Rd:113): Warning: <h5> anchor "Usage" already defined
basismfd.html:172:1 (basismfd.Rd:117): Warning: <h5> anchor "Arguments" already defined
basismfd.html:200:1 (basismfd.Rd:135): Warning: <h5> anchor "Usage" already defined
basismfd.html:206:1 (basismfd.Rd:139): Warning: <h5> anchor "Arguments" already defined
length.html:50:1 (length.Rd:12): Warning: missing </ul> before </div>
mfd.html:146:1 (mfd.Rd:106): Warning: <h5> anchor "Usage" already defined
mfd.html:152:1 (mfd.Rd:110): Warning: <h5> anchor "Arguments" already defined
mfd.html:182:1 (mfd.Rd:126): Warning: <h5> anchor "Usage" already defined
mfd.html:188:1 (mfd.Rd:130): Warning: <h5> anchor "Arguments" already defined
mfd.html:211:1 (mfd.Rd:143): Warning: <h5> anchor "Usage" already defined
mfd.html:217:1 (mfd.Rd:147): Warning: <h5> anchor "Arguments" already defined
mvbasismfd.html:146:1 (mvbasismfd.Rd:81): Warning: <h5> anchor "Usage" already defined
mvbasismfd.html:152:1 (mvbasismfd.Rd:85): Warning: <h5> anchor "Arguments" already defined
mvbasismfd.html:182:1 (mvbasismfd.Rd:101): Warning: <h5> anchor "Usage" already defined
mvbasismfd.html:188:1 (mvbasismfd.Rd:105): Warning: <h5> anchor "Arguments" already defined
mvmfd.html:125:1 (mvmfd.Rd:95): Warning: <h5> anchor "Usage" already defined
mvmfd.html:131:1 (mvmfd.Rd:99): Warning: <h5> anchor "Arguments" already defined
mvmfd.html:161:1 (mvmfd.Rd:115): Warning: <h5> anchor "Usage" already defined
mvmfd.html:167:1 (mvmfd.Rd:119): Warning: <h5> anchor "Arguments" already defined
mvmfd.html:190:1 (mvmfd.Rd:132): Warning: <h5> anchor "Usage" already defined
mvmfd.html:196:1 (mvmfd.Rd:136): Warning: <h5> anchor "Arguments" already defined
plot.html:50:1 (plot.Rd:12): Warning: missing </ul> before </div>
remfpca.html:239:1 (remfpca.Rd:202): Warning: <h5> anchor "Usage" already defined
remfpca.html:245:1 (remfpca.Rd:206): Warning: <h5> anchor "Arguments" already defined