Something happened while loading this page, after I changed the text

When I change the font towards strong I get a fault message. After clicking somewhere else I am send to a new page: Something happened while loading this page.

This happened yesterday as well.

Hi there, were you able to take note of this fault message you got then? Also, are you able to access the form now? If not kindly share the form you have this issue with! Please include at which step and text element triggered this if you can specify.