lucasfc on "[Plugin: BulletProof Security] 500 Internal Server Error"

I dont know what could be wrong but during the instalation the site broke down & now I have a 500 error.
http://www.noticiaspia.org/

Now I cannot access the Dashboard anymore. What could be wrong? Theres is any way to restore this mess ?
Thanks in advance, please help.

L

https://wordpress.org/plugins/bulletproof-security/