Error(s) in re-building vignettes:
--- re-building 'WaterML-Tutorial.Rmd' using rmarkdown
Quitting from lines 60-62 (WaterML-Tutorial.Rmd) 
Error: processing vignette 'WaterML-Tutorial.Rmd' failed with diagnostics:
1: Opening and ending tag mismatch: br line 137 and span
2: Opening and ending tag mismatch: span line 137 and li
3: Opening and ending tag mismatch: br line 137 and span
4: Opening and ending tag mismatch: span line 137 and li
5: Opening and ending tag mismatch: br line 137 and span
6: Opening and ending tag mismatch: span line 137 and li
7: Opening and ending tag mismatch: br line 137 and span
8: Opening and ending tag mismatch: span line 137 and li
9: Opening and ending tag mismatch: br line 137 and span
10: Opening and ending tag mismatch: span line 137 and li
11: Opening and ending tag mismatch: br line 137 and span
12: Opening and ending tag mismatch: span line 137 and li
13: Opening and ending tag mismatch: br line 137 and span
14: Opening and ending tag mismatch: span line 137 and li
15: Opening and ending tag mismatch: br line 137 and span
16: Opening and ending tag mismatch: span line 137 and li
17: Opening and ending tag mismatch: br line 137 and span
18: Opening and ending tag mismatch: span line 137 and li
19: Opening and ending tag mismatch: br line 137 and span
20: Opening and ending tag mismatch: span line 137 and li
21: Opening and ending tag mismatch: br line 137 and span
22: Opening and ending tag mismatch: span line 137 and li
23: Opening and ending tag mismatch: br line 137 and span
24: Opening and ending tag mismatch: span line 137 and li
25: Opening and ending tag mismatch: br line 137 and span
26: Opening and ending tag mismatch: span line 137 and li
27: Opening and ending tag mismatch: li line 137 and ul
28: Opening and ending tag mismatch: li line 137 and span
29: Opening and ending tag mismatch: li line 137 and div
30: Opening and ending tag mismatch: li line 137 and body
31: Opening and ending tag mismatch: li line 137 and html
32: EndTag: '</' not found

--- failed re-building 'WaterML-Tutorial.Rmd'

SUMMARY: processing the following file failed:
  'WaterML-Tutorial.Rmd'

Error: Vignette re-building failed.
Execution halted