Fatal error on enable

Fatal error: Uncaught RuntimeException: FTP-hostnaam is vereist in /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler_disk.class.php:1247 Stack trace: #0 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler_disk.class.php(1296): Cache_Enabler_Disk::get_filesystem() #1 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler_disk.class.php(426): Cache_Enabler_Disk::mkdir_p() #2 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler.class.php(412): Cache_Enabler_Disk::create_settings_file() #3 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler.class.php(366): Cache_Enabler::on_update_backend() #4 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler.class.php(609): Cache_Enabler::update_backend() #5 /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler.class.p in /home/cloudpanel/htdocs/dev.pctoppers.nl/wp-content/plugins/cache-enabler/inc/cache_enabler_disk.class.php on line 1260

Using NGINX on Debian 10 with CloudPanel.io.
Wordpress 5.9.2.