TheDrawingMan wrote: ↑
Fri Jun 21, 2019 6:55 pm
I can now log on. The system recognises me as Admin... but I can't access the ACP. The generated page is:
You might need to test using a different web browser or different computer. Because even back when you originally posted the credentials (before you cleared the phpBB cache), it already let me log all the way in to ACP. And logout. And log back in again. So the kind of failure results you're getting seem like they're symptoms of something more unique to the web browser you're logging in through, or something similar to that.
And it continues to let me login now, after your report of clearing the cache and being able to partially login yourself. The latest two entries in the admin log on your board are from me logging in. Note there is some minor data obfuscation in the screen shot, just in case your credentials don't remain public:
Yeah, not that you can see that, yet.
But I'm saying, the site actually does allow successful login, including to ACP. Actually, I just now went back for a third time, in order to test specifically Firefox 67.0.4 64-bit on Windows 10, since you cited Firefox. But that login and ACP login were both immediately successful too, which should rule out "it's something about your web host that doesn't like Firefox clients."
So it really seems like you're looking for some kind of security configuration set to "high", or a misfiring extension, or some other client-side setting or data that is interfering and creating those results. Especially since the results have happened across two different phpBB 3.2.7 clean installations.