Thanks Jeroen for responding!
I don’t see the possibility to upload print screens, so I’ll try to describe it.
On the page where you put in the slug, your SEO, language settings, etc. you can save your draft or publish your page. After I click on publish I see a red bar above the title of the page with the text:
Publishing failed.
When I delete this page, the page is being deleted, but I’m also being redirected to a webpage with the text:
There has been a critical error on this website. Please check your site admin email inbox for instructions.
Learn more about troubleshooting WordPress.
