Hi John_GS, thanks for your interest, my wife's Apple ipad is about 7 years old and stopped sending updates about 2 years ago. It won't accept Firefox either, however I just downloaded Chrome onto my Samsung Galaxy and there is no error message and all my emails are there so it seems that its my PC which is being the problem.
I tried to erase all the cookies with Ccleaner but is that good enough ??.
Forgive the lack of computer knowledge but at 72 I try my best and I miss Chrome.
An interesting if irritating aside to this issue. I have started to get this "OOPS etc message (not an error 606 specified) and directed to phone help - but only on one of my networked PCs - which happens to be my newest and most high spec games desktop. Have no problem at all with my other desktop (also ethernet connected) or my laptop (wifi). All are updated to latest Win10 (64) other software and drivers etc. Difference seems to be limited to some of the games and apps differences between them.
I seem to be having a similar problem. I can access web-mail from my mobile phone using Chrome and FireFox without issue. However if I try to do it from my desktop PC I was initially getting a screen with a blue background and the message "Can't access the Service" in the middle of the screen with the words "Rev: 58" at the bottom of the screen. I tried clearing the cookies as per the advice at the start of this thread and now I get a plain white screen with three black dots at the top left of the screen then underneath it fields for user name, password, confirm new password, stay signed in check box, a link for "forgot your password" and finally a sign In box.
The problem appears to have coincided with the PC being upgraded to Windows 10 if this helps??.
I still have exactly what you had in the first place (the oops message), I have cleaned the cookies and cache with Ccleaner (don't know if it works) and change my password about 10 times, NOTHING has changed.