Yeah its probably your plugins. The MyBB Staff isn't in charge of plugin support. That is up to the actual developers of these plugins. Most don't have affiliation between the two.
oh thank u so much
it worked
now i know which plugin is making issue to this option
Thanks again !!!
Activate the plugins one at a time until the error once again occurs.
It's likely to be one that hooks into the edit group page... (There must be an error in the plugins ode which makes the rest of the page not be output).
it was the game section plugin
i hope they bring in updates to that plugin so this error will be solved !!
thank u for your support
I have the same problem , but in my case is the Country Flag Plugin. I disable now. thanks
BTW. Is funy, because I admin 3 foruns, and just have this problem with one of them. the others 2 seems are ok.