Thumbnails reverted to default

[Marcus23879007u7rt]

After the latest upgrade, my pdf thumbnails which previously displayed the cover of the document. Has now reverted more than half of my pdf documents to the default pdf icon. Does anyone have a fix for this matter?

[Harsh Vardhan Pareek]

Hi @Marcus23879007u7rt 

Here is a discussion link that you can refer to, try the troubleshooting steps and let us know if that works.

https://community.adobe.com/t5/acrobat-discussions/thumbnail-does-not-appear-for-acrobat-pro-dc/m-p/...

Thanks,

Harsh