Gutenberg post editor issues

When I go back in to edit a post instead of clicking edit with divi I go to default editor (what I want to do) and get an error message

The editor has encountered an unexpected error.

Attempt Recovery
Copy Post Text
Copy Error

The code is this

TypeError: Cannot read property ‘title’ of undefined
at https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/block-editor.min.js?ver=3.2.5:49:109208
at je (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:78:476)
at qe (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:89:115)
at ph (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:216:489)
at lh (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:126:409)
at O (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:121:71)
at ze (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:118:14)
at https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:53:49
at unstable_runWithPriority (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react.min.js?ver=16.9.0:26:340)
at Ma (https://www.wolseleycarclub.shaner2.sg-host.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.9.0:52:280)

Once rankmath is disabled it works fine