I noticed this with the topic at the following URL: How can I make app_metadata available in /userinfo endpoint? - Auth0 Community . The topic title contains a forward slash, i.e. “How can I make app metadata available in /userinfo?”
If I follow the link to that topic from the forum topic list view, the page is more or less broken, and I’m unable to respond to the topic.
The workaround I found is to strip the topic title from the URL, i.e. How can I make app_metadata available in /userinfo endpoint? - Auth0 Community , but it is definitely a bug in the forum software that the standard link to a topic whose title contains / leads to a broken page.