This broke my admin dashboard

Hi @mroriz you can try to disable the plugin from the server side of things. Go into your site’s folder wp-content/plugin and rename the jQuery Migrate Helper plugin to something else and see if that helps recover the dashboard.

If that works then the plugin is probably conflicting with another one, try to add the plugin without any other plugin active to see if it will work. You can also add the Debug Plugin to see if there are any errors coming from your site: https://www.ads-software.com/plugins/debug-bar/