My forums stopped working

[hezbelshaitan]

Hello
I'm semi-new to phpbb so far I've built some great forums.
Recently, an error appeared out of now where, when I visit my forums at www.hezbelshaitan.com/forums
I get this error:

[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/di/container_builder.php on line 146: require(./cache/production/autoload_4335734bbdd20f586549a504dff5f80c.php): failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/di/container_builder.php on line 146: require(./cache/production/autoload_4335734bbdd20f586549a504dff5f80c.php): failed to open stream: No such file or directory

Fatal error: require(): Failed opening required './cache/production/autoload_4335734bbdd20f586549a504dff5f80c.php' (include_path='.:/opt/php70/lib/php') in /home3/hezbelsh/public_html/forums/phpbb/di/container_builder.php on line 146

Any help will be appreciated. thanks.

[_Vinny_]

If you have FTP access to the server:
Delete the /cache/production/ folder from the server to allow it to be recreated automatically.