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Full Version: Fatal error: undefined function mb_strlen()
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I got this error in the Usergroups merge:

Fatal error: Call to undefined function mb_strlen() in /usr/share/nginx/html/dot2dotjc/www/mybb/merge/resources/class_converter_module.php on line 169

I'm guessing that it was unable to access the function. Do I need to change some permissions for the merge scripts to work?

I forgot to restart php-fpm and nginx after installing the php-gd and php-mbstring packages. It is working now.