Safari can't open Links (Error -600)

Hey everyone,

my Safari won't open any links I click on. I noticed that first when trying to open a link I got in an e-mail (Apple Mail) and then tried a link I had saved in notes – the same problem.

Whenever I click on a link, I get this message:

The application can’t be opened.

(-600)

If you know anything to fix it, please let me know. I haven't downloaded any updates or new programs recently and my MacBook Pro is on macOS Big Sur Version 11.1.

Thank you!