Import failed

The content seems empty of canvases, cf:
http://ns342141.ip-5-196-76.eu:5555/task/ea67120d-1aa2-4820-8688-f3cc5c9ce421
http://ns342141.ip-5-196-76.eu:5555/task/7495a49c-e83f-4d5f-961f-01e16409157a

Traceback (most recent call last):
  File "/usr/src/app/apps/imports/parsers.py", line 217, in __init__
    self.canvases = self.manifest['sequences'][0]['canvases']
IndexError: list index out of range