Well after seeing that the "help" here did not work. I decided to look for it myself and I found it for my case.
I take a long history of trial and error that does not count, I'll just say the solution.
If you have started the session in opera with the synchronization activated, reset the synchronization.
Uncheck the configuration synchronization option, in the configuration panel in the Browser section. Settings / Browser / Advanced configuration.
Reset the factory opera. Settings / Browser / Reset Opera.
Re-login with your opera account and synchronize again.
Enjoy flash xD