[DanCooper]

here I moved the conversation to the problem. Three disks have disappeared, I have been working for a few years, now not

https://forum.kodi.tv/showthread.php?tid=153502&page=33

 Neither Ember or MSAA supports discs for movie set, and very few skins supports it
So what skin are you using now and what did you use when it was functioning? 

 Ember supports DiscArt for movie sets, just enable it in the "Kodi Interface Defaults". But as the settings title say: this images can only be synced with the Kodi Interface, not with MSAA.
But I think Poland's problem is another...