Avada allowed memory size exhausted

WordPress Avada theme users might experience the following error on their website:

Fatal error: Allowed memory size of X bytes exhausted (tried to allocate X bytes) in /home/username/public_html/wp-content/plugins/fusion-builder/inc/class-fusion-builder-options.php on line 60

To resolve the problem, delete the /.opcache hidden folder from the home directory of your account.