This isn’t a user error. I have lots of shows subbed and monitored. Didn’t touch anything. Everything was working fine. Now the calendar is empty.
My latest debug log: https://pastebin.com/raw/66ZknKi5
So I looked for a TV show that was running this summer and that TVDB had the episodes and dates listed. I found “Gordon Ramsay: Uncharted” fit the bill. So I added the series in SONARR and then when to the calendar and all the future episodes (they’re airing June and July) are there.
So it is quite possible that for the series I already had in SONARR (and the other people with this issue) simply don’t have announced airing dates yet hence TVDB isn’t populated.