Error Msg: Could not find valid content type

[TraceU2]

OS: Linux / Libreelec 8.2.5
Kodi: Krypton 17.6
Skin: Estuary

All was working perfectly. With my movies on a simple sqlite db pressing "More Info" button "Extendend Info" found all informations on themoviedb, amazing.
But since the last update to Version 5.6.0. I allways get the Message on the screen: Could not find valid content type. P.S. I will attach the kodi.log later only with the script error.

Cheers
Roli