On this page https://helpx.adobe.com/creative-cloud/kb/configuration-error.html#win_10 Section Windows 10 | Set permissions, there seems to be an error :
Windows 32 bit: Program Files\Common Files\Adobe\Adobe PCD\
Windows 64 bit: Program Files (x86)\Common Files\Adobe\ Adobe PCD\Should be
Windows 64 bit: Program Files\Common Files\Adobe\Adobe PCD\
Windows 32 bit: Program Files (x86)\Common Files\Adobe\ Adobe PCD\
Or am I wrong ? If instructions to fix problems are buggy, things are becoming difficult for the user :-) .
This doesn't fix the problem anyway. I have to run PS as an administrator (option set in the exe properties) to get rid of the error message when PS is launched from Lightroom. If I launch it directly, there's no problem.