WYSIWYG Visual editor not working

I was having an issue on a new site build and then replicated the issue on a fresh WordPress installation.

All I have installed are the two latest Meta Box plugins (Meta Box v5.6.18 & Meta Box AIO v1.20.2) and the latest Default WordPress Theme (Twenty Twenty-Three v1.1) all on the latest WordPress version 6.02.

I added a WYSIWYG custom field to both Pages & Posts. However, I am unable to enter or see any data in the Visual tab or the WYSIWYG editor. The Text tab does work and I am able to save data. However, it is not visible or editable in the Visual editor.

I made a video to show the issue: https://youtu.be/ky7RZf11ZDQ

Is this a bug and if so do the developers know about it? Otherwise can someone please explain what I am doing wrong or how to get the Visual tab to work?

I have tried on Chrome and Internet Explorer and the issue exists on both.

Thanks