Thanks for creating a new topic, @superandreescu! We can imagine how concerning it can be when the Yoast meta box doesn’t load properly on the post edit screen.
Can you please try clearing your browser cache and cookies before restarting your browser? Then, please check if the issue persists. You may also try a different modern browser or another device.
If the problem still happens after resetting the browser cache, or when using another browser/device, it may be due to a conflict with another plugin or theme. The fastest way to rule out any conflict is to?deactivate all non-Yoast plugins and switch to a standard theme?like?Twenty Twenty-Two.
Please test this on your development or staging site if you have one. If not, we recommend using the Health Check & Troubleshooting plugin. This plugin has a troubleshooting mode, which does not affect normal visitors to your site.
If you’re unfamiliar with checking for conflicts, we’d like to point you to a step-by-step guide that will walk you through the process: How to check for plugin conflicts
Let us know the results!