This may be a plugin or theme conflict. Please attempt to disable all plugins, and switch to the default Twenty Twenty theme. If the problem goes away, enable them one by one to identify the source of the problem.
If you can install plugins, install Health Check. On the troubleshooting tab, you can click the button to disable all plugins and change the theme for you, while you’re still logged in, without affecting normal visitors to your site.
I installed Health Check and all plugins were disabled – i then re-enabled classic editor and was able to go between the visual and text tabs when creating a post.
It has turned out to be Yoast SEO which is kinda odd—–does this mean I cant use Yoast?
- This reply was modified 5 hours, 53 minutes ago by delre.
Glad it’s sorted 🙂
Next, please report the issue at the Yoast SEO support forum so the plugin author can take action as appropriate.