@harsh-1903 bro i solved it very complicated. but every time I reinstall it, the same happens and it takes 40 hours until I solve it. Turn off sync passwords first when opening your account. Then after your account is opened, everything will be synced. restart your computer. Then turn on passwords in settings. It will say passwords will be reset. Those are the passwords that will be reset, not your old passwords, but the ones you just uploaded, so you don't have to be afraid. then opera will close and open and passwords will be synchronized. You will have successfully entered your account. but I don't know if it will fix you like that. I switched to a different browser than you.
"I'm not writing from opera right now"