Missing thumbnails and error message, how to fix?

I reinstalled CDGS 2017 and now the thumbnails are missing. I found that it could be something related to the shell extension.

I have these two shell extension versions installed:

I tried to repair the CDGS 2017 installation but got the following error message:

Is there a fix for all that? I need the thumbnails back, they're time savers for my work. Please, help me! TIA.

CorelDRAW 2017
Windows 10 Pro | 21H2 | 19044.1566