Can you test with debug = 2 in config.php, please? Post any error message here.

Thanks for the quick response. I've changed the debug flag to 'debug =>2' in /application/config/config.php but I can't see any additional log files generated. The log folders seem to just have an index.html file within?

When I enter the confirmationKey and click the Create 2FA Binding I get a very brief circle of dots displayed which disappears and simply returns the same screen. I've tried to screenshot, but can't grab the circle of dots as it's just too quick!

Screen Shot 2021-09-23 at 11.30.18.jpg (63,230 bytes)   

Screen Shot 2021-09-23 at 11.30.18.jpg (63,230 bytes)   

I cannot reproduce this. Because 2FA is time-sensitive, a possible problem would be that either your client device or your server is out of sync regarding time.
Can you please check?

Ah, that's fixed it! Thanks for your help.

Perhaps a dialogue box with a suggestion to check the server and client times are synchronized rather than a quickly disappearing circle of dots might be a good future development?

All working now with the following added to my /etc/rc.conf file:

ntpd_enable="YES"
ntpdate_enable="YES"

Perhaps a dialogue box with a suggestion to check the server and client times are synchronized rather than a quickly disappearing circle of dots might be a good future development?

I think current time must be show at plugin settings too. Because it's an admin issue :)

I will close this ticket since it is not a bug. Feel free to re-open it if you feel otherwise.