Hey,
I sent a request to the other plugin, now I am waiting the answer. Just to explain exactly what happens:
First: When I activate “UsersWP” Plugin the another plugin does not work, the page just load and nothing happen, it seens a backend infinite loop, i am not sure…
Second: I deactivated “UsersWP” then the plugin works fine.
The Plugin: It helps me to organize menus and relateds stuffs, it is called “Custom Admin Interface“, i am using free version of it.
That is it…
To summarize: With UsersWP it does not working, without UsersWP it works.
Thank you!