I am using userman v6.7 on RB2011UAS-2HND-IN v6.7, and I am getting this error when logging to userman from firefox or google chrome :

your session has been reset due to inactivity

Is there a solution for this problem ?

open it with IE.

Are you serious?
Mikrotik?

I got this problem and yes, it works only in IE.

There's no fix for this ?

Try to clear cache in the browser.
And cookie.

User manager works well on all version of Internet Explorer 8.0+ and Firefox 26+
I use the program everyday, on multiple pc (with different operators) and I never have that problem, except leaving open the user-manager (without touch anything) for more than 20 minutes.

Wait for fix on Firefox 47.23 or 66.6

About google chrome, if you hate IE, i not understand how you can use chrome...

May work on IE... but I use a Mac instead of a buggy windows platform, so that's not helpful

Please check your Database file "um-before-migration" in "/Files"