WPBakery Page Builder is very slow/not working

I’ve made a Wordpress website using the Bridge Theme. The WPBakery Page Builder is incredibly slow. We can’t really work with it. And after saving the changes, we sometimes see an errorpage.
Wordpres version is 5.8.2
Bridge Version: 19.9
WPBakery Page Builder version: 6.7.0
The first version of the website was made on another server/host.
The website was exported to its current server/host, using All-in-One WP Migration (Unlimited Extension)

WPBakery Page Builder worked fine on the other server where the site was tested and made(host: Strato), But at the actual site where it was supposed to work fine, it just didn’t work…

regards,
Harald

Problem was solved.

Plug-in Yoast SEO was the source of the problem,

kind regards,

Harald Sprenkeling