Der is op it stuit in upgrade dwaande... Kom asjebleaft gau werom...
WHMCS\Exception\Application\InstallationVersionMisMatch: Database ferzje '8.6.1-release.1' komt net oerien mei triemferzje '8.4.1-release.1' yn /home/vdopanel/public_html/my/vendor/whmcs/whmcs-foundation /lib/Application/ApplicationServiceProvider.php:0
Stapel trace:
#0 /home/vdopanel/public_html/my/init.php(0): WHMCS\Application\ApplicationServiceProvider::checkVersion()
#1 /home/vdopanel/public_html/my/submitticket.php(0): ûnbekend()
#2 {haad}