Sickchill: Downloading subtitles fails

[hoontje]

Enable debug logging in SickChill settings, reproduce the error (be sure to disable after the bug is fixed) Don't know how

Branch/Commit: Master/9336df163c7e776c7931d864e84d1f0f83afe4d
OS: DSM 6.2.3-25426 Update 2
Browser: Microsoft Edge Versie 87.0.664.52 (Officiële build) (64-bits) (not the issue)
What you did: Tried to download subtitles
What happened: No download, just error message in log
What you expected: downloaded subtitle file from opensubtitle.org
Logs:
```
PASTE LOGS HERE
2020-12-04 12:32:52 INFO FINDSUBTITLES :: Finished checking for missed subtitles
AA ValueError: The guess must be an episode guess
AA raise ValueError('The guess must be an episode guess')
AA File "/volume1/@appstore/sickchill/var/SickBeard/lib/subliminal/video.py", line 186, in fromguess
AA guess_ep = Episode.fromguess(None, guessit(episode.release_name))
AA File "/volume1/@appstore/sickchill/var/SickBeard/sickbeard/subtitles.py", line 572, in refine_video
AA refine_video(video, episode)
AA File "/volume1/@appstore/sickchill/var/SickBeard/sickbeard/subtitles.py", line 362, in get_video
2020-12-04 12:32:52 INFO FINDSUBTITLES :: Traceback (most recent call last):

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