“read more” does not work

Hello, I run a WordPress site "hohomanager.com" with the "Catch Base" theme. For a while now, the "Read More" option in embedded links has not worked. The link can be clicked, but the forwarding does not work (see example at https://de.hohomanager.com/willkommen-beim-hohomanager-2/faq-tips-und-tricks-2/). ... as a workaround, I also added the link manually under the embedded element. However, this may not be the solution. I've been experimenting with possible solutions for a few days now. Unfortunately, I can't get any further and I'm pretty desperate. I also tried to change "More Tag Settings" in the theme settings - but this had no effect. While the site is running in multiple languages, the Read More tag is still in "English" ... I'm really close to giving up and would be grateful for help. Oliver