Must be some plugin causing a PHP error which further results in a 500 Internal Server Error.
If you want, I can look into it. Send me your FTP details and an admin account.
MyBB Support
Can't go into plugins config
Submitted by Sui, 22-10-2015, 01:41 AM, Thread ID: 11584
Thread Closed
RE: Can't go into plugins config 22-10-2015, 12:27 PM #20
22-10-2015, 12:27 PM
#20