Failed loading "ioncube_loader_lin_7.2.so" Cron Error after CiviCRM & WordPress Upgrades
Were there any php changes as well? I've seen this when there's multiple versions of php installed and cron is using a different one than the web server. Give the full path to php in your cron task for the version you want it to use, and/or check the hosting control panel to make sure php is the one you want.