Cant login to user panel

i am unable to login to the user web panel, i have several users and none can log in. There are no errors, it acts like its authenticating then the screen refreshes to the login prompt. i tried restarting the CSF firewall as mentioned in another post but still the same issue

This may be due to several circumstances! Do you have any user that can log in?

try to check also if you have multiple tabs with a different session
http://wiki.centos-webpanel.com/invalid-session-in-the-panel

This may be due to several circumstances! Do you have any user that can log in?

No, none of my users can log in.

try to check also if you have multiple tabs with a different session
http://wiki.centos-webpanel.com/invalid-session-in-the-panel

I am aware of this issue, i have experienced it and understand it now. but this is a different issue i feel.

I just had this experience today - trying to log in to any user panel didn't work - it just thought about it for a bit, then reloaded the login screen. Wasn't sure what the issue was - and never experienced it before.
But reading about potential tabs/session confusion - I tried it in a new incognito browser (no session info saved) and it worked fine.
Not sure if this is the same issue - but thought I would mention in case it helps someone!