I have a problem with missing episode names. There is no problem with season 1 but there are no names in season 2. I am using tmdb and already checked it with tmdb.
Try moving Season 2 out of your library in your filesystem. Then, perform a full rescan of the series with "Replace All." Once that scan is complete, re-add Season 2 to the series folder and rescan again.
Having subfolders within a library is not fully supported and can be inconsistent—sometimes it works, other times it doesn't. To ensure proper organization, libraries should be structured as follows:
Series\
├── Show 1 (2000)\
│ ├── Season 1\
│ │ ├── S01E01.mkv
│ │ ├── S01E02.mkv
│ ├── Season 2\
│ │ ├── S02E01.mkv
│ │ ├── S02E02.mkv
├── Show 2 (2000)\
│ ├── Season 1\
│ │ ├── S01E01.mkv
│ │ ├── S01E02.mkv
│ ├── Season 2\
│ │ ├── S02E01.mkv
│ │ ├── S02E02.mkv
I have now move all animes to the anime folder and now only the anime follower as directory. Tried again all the steps above but still nothing. Anything other I can try?