I have finally been able to sign into Flow on my HP PC and my Samsung s8 tablet.
Happy Dance!
Thanks, Devs.
I'm 81 years old and used Flow all the time until it recently starting failing me.
It is incredibly useful...thanks for fixing it. 
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I have finally been able to sign into Flow on my HP PC and my Samsung s8 tablet.
Happy Dance!
Thanks, Devs.
I'm 81 years old and used Flow all the time until it recently starting failing me.
It is incredibly useful...thanks for fixing it. 
AokoG:
That solution did not work for me.
I am trying to connect my Samsung S8 tablet to my HP desktop and the tablet just will not recognize the QR code on the HP desktop screen at all. So it fails at the first step.
I've been using Opera for maybe 20 years and never had had any trouble with Flow until now. (model Samsung x700 Android version 13)
Maybe it's the fault of my Samsung tablet. But I have been using Flow up until recently daily between these two devices.
Thanks for trying to help....I find Flow very useful and I wish I could use it. 
@coldsgt65 This keeps happening to me also.
Would appreciate some help!
@phoinixtk Thanks so much! Your clear explanation on how to add this to the sidebar made my day.
I also added three cloud storage sites to the sidebar making my life much easier.

Getting message that Keep is blocked. Thought it was related to my changing my Google password but see that others have the same problem.
Worked great for a long time.
Look for an extension called V7 Notes. It's the closest I've found to an Opera notes solution. You can import your old notes from Opera 12 or Opera Presto.
Are you people referring to Opera 31? I'm using Opera 30 and I LOVE the speed dial thumbnails - they are beautiful and if you want to change them to thumbnail screenshots of the web site just click on the heart.
Lots of choices for everyone - what's not to love? 
Not understanding the complaints...
+2 I am still using Opera Mail (standalone now) and can't find a decent replacement. Loved the browser integrated email...some people just don't want Google handling their emails and the attraction of GMail, I guess, is that it is integrated into the browser.
The "heart" method of choosing the look of the speed dial tile does not work in version 28.0.1750.40, correct? I can scroll through the possible choices but when I select the color tile version it does not "stick" but reverts to a screenshot of the web site.
If I'm wrong, could someone direct me how to do it?
Yes, please add notes and add open in follower tab (create linked tab). Opera 12 was the best browser ever created...just add all its features and you can't go wrong.
