The extension does not work on latest Safari 11.0

I have macOS 10.13 and Safari 11.0.
The extension opens but always request for the user to login. If I login it does the same, no way to import anything

Thanks.

That’s strange. It seems fine for me. Have you tried restarting your browser?

I have tried restarting Safari and restarting the Mac.
On Google Chrome works perfectly.

That is strange. Have you tried removing and reinstalling the Safari extension?