How to add a link to the no-access message

Sorry about that - it is not your text, it appears to be the code of the page

In some cases, the text is delivered in a way that does not allow for markdown. It is possible that using standard HTML will work in some cases, but it appears that this may not work on this specific occasion either.

I apologise for misleading you here, but this is something you might try in other places of your forum