Blank page in back end on Publishing or Updating posts

Hi guys,

When uploading a post, or updating it, once I click the Publish or Update button, i get redirected to mysite.com/wp-admin/post.php which is a blank page (rather than mysite.com/wp-admin/post.php?post=1&action=edit, which you’d expect)

In debug mode I had three errors, which I resolved. I’ve deactivated all plugins (including woocommerce), but his made no difference.

Anything come across this before?

Thanks!