Unable to merge - Unknown Error Occurred

Question

I'm a beginner with Lightroom Classic and started with version 11.2 in Windows.
I have some problems with Lightroom Classis: 
 
1. Cannot merge HDR: Error when merging photos. Unknown errors occured.
 
2. Mask: Select Sky: Something went wrond. An unexpected error occurred and your request could not be completed.
 
3. Mask: when I use my brush I cannot see which area is selected. I saw it by others and there it shows a red glow on the selected area. 
 
Please, can someone help me out? 
 
Greetz,
Sandra

johnrellis · Answer

"Mask: Select Sky: Something went wrond. An unexpected error occurred and your request could not be completed." Your graphics driver is out-of-date. Update it following these instructions:https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-4 Windows Update often doesn't keep the driver up-to-date. If that doesn't help, then do the menu command Help > System Info and copy/paste the entire contents here.

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