Mautic is offline

The site is currently offline due to encountering an error. If the problem persists, please contact the system administrator.

System administrators, check server logs for errors.

Check log and this is what is showing but don’t know what to do?

[06-Dec-2020 19:39:41 UTC] PHP Warning: mkdir(): Permission denied in /home4/erbornb2/ on line 41

try chown the entire mautic directory again chown -R www-data:www-data /var/www/mautic