Opera is updating every day, now version is 67.0.3575.115, but what the hell - opera can't save pass and cookies. I tried to full uninstall, but it doesn't work. When i enter the password, opera asks to save this password - but button "Save" not working.
If it still does it in the standalone installation without Opera Sync enabled, it's very likely it's something outside of Opera that's interfering with Opera. Of course, it could just be a bug in Opera, but so far, it's uncertain.