Menu tabs troubles

Same problem here!

Sometimes strange behavior may be caused by a plugin or theme conflict. The fastest way to rule out conflicts is to deactivate all non-Yoast plugins and switch to a standard theme like Twenty Seventeen. If this resolves the issue, you have a conflict and should activate one plugin at a time until you locate the conflict. Finally, after all plugins are active, switch to your theme. This will narrow down the conflict to a specific plugin or theme.

If you are unfamiliar with checking for conflicts, we wrote a small guide that will walk you through the steps. You can find it here: How To Check For Plugin Conflicts

Hi

I switched to Twenty Sixteen theme:

Activated only Yoast SEO:

But the issue still remain:

That is strange. Do you see any errors in your browser’s console?

How to find JavaScript errors with your browser’s console?

I see this:

The errors imply that JavaScript is not enabled or enabled too late. If you disable only the Yoast plugin, do you see similar errors about undefined jquery?

I reinstalled WordPress and issue disappeared ??