Problem in open post
Thanks for your good plugin. I used the plugin more than 4 months. Today I Figure out All users will get an error after input the username and password!(attachment)
Have you tried to delete cookies? Where we can test it? Any URL?
Information and solutions to this problem can be found here
Also remove the Endurance Cache from wpforo pages. Actually get rid of it totally and use some Wordpress caching plugin (also excude wpforo pages).