SIS: SIS navigation (left pane) works, but final link (right pane) fails

Problem:
User logs in to SIS OK, navigates OK. When they click on the final link (brings up a form page) nothing happens. The user has the proper rights to access the page, and it works fine from a different computer.

Example: Click Records and Enrollment, works OK. Click Enroll Students, works OK. Click Enrollment Request, nothing.

Solution:
Please see attachment or refer to Issue #88281