@leocg I try to log-in with same devices same e-mail same account and try to sync but everything is gone like a beginner account
So I'm give up now.
Thanks for answer me. I'm so tired now I'll make new speed dial and always backup and remember all my password.
Well... As Mac-2 is on the way to repair service, I decided to purge the HD and reinstall the MacOS operating system, altogether. With Mac, its not such a big deal as with Windows. But one only needs to do it in very rare occasions - like now, when I'm testing a heating problem of Mac-2.
After the OS was installed, I downloaded Opera and logged into sync. And now I can see all three devices - Mac-1, Mac-2 and Windows-PC open tabs, bookmarks and speed dial.
I guess we can call this case solved, even though we don't know what caused the problem, initially. Thank you @lecog for your help, and let's carry on from here. Have a great summer and stay healthy!
over and out!
@nquateman, you can move it to another computer, but the results are going to be the same. Opera's become severely broken and buggy and I don't know why. I have multiple computers with Opera installed, and they all act the same exact way. The Opera team needs to figure out what's going on, or start building the browser from the ground up on their own again instead of using Chromium.
@neetesha I was only able to see the pre-installed bookmarks after installing Android Opera.
I uninstalled the app, and shut down and restarted the phone. I logged out of the desktop app and reinstalled the Android app. This installation deleted all of the sync items from the sync server but was a "clean" install.
After 3 log in attempts, I finally was able to successfully log in and sync the account. It then took about 15 minutes for the bookmarks to appear on my Android phone. The history and opened tabs did not sync.