Internal Server Error New User Can't login

Out of sudden, now new user created cannot login. Error message :
Internal Server Error
The server encountered an internal error and was unable to complete your request.

Please contact the server administrator if this error reappears multiple times and include the technical details below in your report.

More details can be found in the server log.

Technical details
Remote Address:
Request ID: W39nyS91gMhF7WAkGupJdgAAABU

System Status



Thanks in advance.

In order to be able to help you, you should supply some more info. Any error message from logfile?


How is this related to our current topic here?

It’s working now. found out that the problem is due to memcached.lock

You can do this by marking the thread as solved.

I have disabled memcached.locking on config.php and now the login for new user is working fine.
Now this message appeared on my admin setting page.
Security & setup warnings
Transactional file locking should be configured to use memory-based locking, not the default slow database-based locking. See the documentation :arrow_upper_right: for more information.

Is there any negative side affects with disabling memcached.locking ?


the message you have quoted contains a text “See the documentation for more information”. Have you tried to click on that link to see if the mentioned information contains some notes on the side affects?

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