Try setting Preferences > Performance > Use Graphics Processor to Off. Then update your graphics driver by going directly to the manufacturer's web site (solution 4 in this article):
Google translation: "It was indeed the graphics processor that was causing me problem, I followed your instructions and everything is back to normal. The problem is therefore resolved."
Great, glad you got it resolved.
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Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.
Try setting Preferences > Performance > Use Graphics Processor to Off. Then update your graphics driver by going directly to the manufacturer's web site (solution 4 in this article):