@tobiby This appears to be a reoccurring issue on Opera. I absolutely love the app. It's a researcher's dream. However, it keeps logging you out and subsequently prevents syncing when necessary.
Last year, my phone went dead on me suddenly, I was panicked as I had so many tabs opened and all my passwords and research work had no backup. Since the phone wasn't working, I couldn't sign in on it as Opera had signed me out (I wonder why that happens?).
I reached out to the Opera team on Playstore but just simply told me to sync the devices by scanning the code. Of course I couldn't and so no matter how hard I tried, I lost everything and had to start afresh.

@tobiby This appears to be a reoccurring issue on Opera. I absolutely love the app. It's a researcher's dream. However, it keeps logging you out and subsequently prevents syncing when necessary.
Last year, my phone went dead on me suddenly, I was panicked as I had so many tabs opened and all my passwords and research work had no backup. Since the phone wasn't working, I couldn't sign in on it as Opera had signed me out (I wonder why that happens?).
I reached out to the Opera team on Playstore but just simply told me to sync the devices by scanning the code. Of course I couldn't and so no matter how hard I tried, I lost everything and had to start afresh.