An error arrives in the mail with the following header:
Cron [-x / usr / lib / php / sessionclean] && / usr / lib / php / sessionclean
and with such content:
PHP Warning: PHP Startup: Unable to load dynamic library '/ usr / lib / php / 20151012 /' - / usr / lib / php / 20151012 /: cannot read the file in this directory
What can it be and how to fix it?