Lightroom 6.6.1 was working fine on my Windows 10 Pro (64 bit) machine until Microsoft published Update Version 1607 (Build 14393.10). Since that update, the "Server Busy [...] Switch to.../Retry/Cancel" error message constantly keeps popping up when I try to start LR. This renders LR completely unusable. I cannot even quit LR without killing it via the Task Manager. Reinstalling LR helped for one go, but the problem reoccurred. I don't want to reinstall LR every time I want to use it
Are there any log files I can inspect? Is there some configuration I can fix?