Plugins crashed my server

Hi,

I`ve installed 2 plugins ( winusers and bitlocker ) and after extract them to the extensions folder and install them via browser, i keep getting a blank page for everything. already tried to reboot the machine and restart the services but no good. the plugins sucesfully installed but now i cant use OCS server. i just hit the login page and when i log in is a blank page and i followed everything your tutorial said.

Please advise

Thanks