Hi, When changing the joomla update channel from default to Joomla next, then saving. I'm immediately presented with this error "PlgSystemHelixultimate::onExtensionBeforeSave(): Argument #1 ($event) must be of type Joomla\CMS\Event\Model\BeforeSaveEvent, string given, called in /home/absolutelygraphi/public_html/libraries/src/Plugin/CMSPlugin.php on line 289"

I've updated both Helix ultimate and page builder to the latest versions and cleared the cache. What else do i need to do to get by this?

Thanks