I do think that it is kind of odd to ask for a passphrase. I believe that I remember thinking about that when I had first seen it and thinking, I don't need that. My passwords are encrypted anyway, and I have another app for that that I have had for the past 5 yrs....
This is just another headache for me. I like Opera, it's stable no matter how many tabs that I have open. I believe that Opera Mini finally cut me off from opening anymore tabs, so I know that I have well over a 100. I was nearing the 200 mark.

But Firefox uses only one login and password, and I have 4 of their apps on my phone with 100+ tabs opened and synced per program. So I have a list of 400+ tabs that are opened on my cell. However with the Firefox apps, you start getting near 100 tabs being opened, and it starts crashing on you. Thus the 4 Mozilla apps. lol But Opera mini has close to 200 opened right now and I still don't have any issues. That is except for the dang passphrase. I really didn't want to have to start over from scratch all over again.

@sgunhouse
Thank you very much. I did just recently do that a few days ago, and I put in my old password for the passphrase and that didn't work. So now my only other thought was that it wants the old password from back 3 yrs ago that my laptop was under. Which I don't remember and can't find that I had it hidden somewhere either.
Thank you very much for replying to my question.
Have good weekend

I am so incredibly lost and trying to find answers or even hints to trigger my memory. I have been using Opera Mini for Android since Summer of '16. Sadly I don't remember creating a Passphrase.
Now my Opera was updated without my prior knowledge thanks to Microsoft and Windows 10. This week has been a wk from heck (saying nicely) thanks to Microsoft so I was not prepared to try to look for anything like that. And the laptop hasn't been online since Summer of '16.
i have a lot of info stored in Sync. And I mean to the tune of 200 and some odd tabs open on Mobile I guess.
HELP!

On the new Opera Mini, all it shows is All under the Sync. Nothing about any synced information. I wish that I could send you a SS so that you could see what I am talking about. I'm just very grateful that I backed everything up 5 days ago. Whew!!!
Importing 180some odd open tabs in your full Opera Mobile version was starting to tick me off. It kept scrolling back to the very beginning of what Tabs that I had saved after I would open a page in background/foreground. I'm just glad that a cooler head prevailed and I thought Why not do Mini and see what happens? It kept me on my Saved Tabs page and I was able to click on at 15 or so pages and open into my new Mini browser before it kicked me to the beginning of my Saved Tabs Page in Sync.
That bug in the full Opera Mobile really needs to be fixed. Thanks!!

I am very glad that you have the Sync option available because it saved 6yrs worth of my information from Laptop to Web to Cell. I am very grateful that one of the versions worked right for me.