Steps to reproduce the issue

Go to Administrator / Help / License

Expected result

A licence document

Actual result

Nothing

System information (as much as possible)

Firefox on Mac, remote shared host.

Additional comments

Console says: The loading of “https://www.gnu.org/licenses/old-licenses/gpl-2.0.html” in a frame is denied by “X-Frame-Options“ directive set to “sameorigin“. I think that means the remote site is blocking loading in a frame.