I have replicated the problem & have the complete error message now:
TypeError thrown
Argument 2 passed to Tribe__Events__Meta__Save::__construct() must be an instance of WP_Post, null given, called in /home/cluster-sites/13054/t/tsauction.co.uk/public_html/wp-content/plugins/the-events-calendar/src/Tribe/Main.php on line 2886
Can anyone help? It’s urgent