[BUG] Marking episode as watched throws AttributeError

[dm1tz]

Describe the bug

Trying to mark an episode as watched on trakt.tv results in AttributeError: 'TraktAPI' object has no attribute '_get_sync'
Could be related to #1095, but the error log is a bit different.

Steps To Reproduce

1. Select a tvshow episode
2. Go to Details page by pressing 'i'
3. On the left panel select trakt button
4. Click mark as watched in the sidemenu

Debug log

kodi.log

Screenshots and Additional Info

Translation: Failed to mark as watched for episode!

Checklist

• I have searched the issues and this bug has not been reported.
• I have updated TMDbHelper to the most recent version.
• I have described the bug and included steps to reproduce the issue
• I have uploaded my debug log.

[jurialmunkey]

Is this issue still occurring?

[dm1tz]

Is this issue still occurring?

Yes. Just tested it, still gives ''failed to mark as watched".

[dm1tz]

A little clarification: if I go to the Details page and mark the episode as watched from "Your Next Episodes" it works, but if I try to do that going from "Your Recently Watched" then it fails.