No images shown in Twinky/TV after upgrade

I upgraded my WDCloudMirror to OS5, and after that, there are now images shown in videofiles on my tv, nor on the Twonky server.

All vidio files are changes to MP4 after upgrade.

Anyone know the issue about missing images for videos files??

@Bospe
The following article explains Twonky thumbnails for video content.
https://support-en.wd.com/app/answers/detail/a_id/29845

Ok thx. But I still dont know how to fix it.

@Bospe the instructions are in the article

No, they just tell a story…not what to do

Have you read the article yourself??

WD must thing their costumers are stupid… They disclaim evrything. even they gave a poor funtionel level af NAS.

And I dnt have a master in IT, how in the world should ordinary people be able to fix such a smalle issue???