Good news
After running Onyx ”Automative” option the problem seems solved.
After execution of this Onyx thing, I uninstalled ”Web Clipper” and close and restarted Safari reinstalling from this direct link: https://safari-extensions.apple.com/details/?id=com.evernote.safari.clipper-Q79WDW8YH9
One of a sudden it worked logging in and everything seems ok so far.
Obvious my Mac was blocking something that caused Web Clipper installation to failure!
BR
Torbjörn
ps. Onyx is free to use. Link: http://www.titanium.free.fr