When opening a record form, the related lists do not load and the right click context menu does not show the expected options. The browser debug console shows an error similar to this: Uncaught TypeError: Cannot set property "property_name" of null
An example console error can be seen in the image below:
Kingston Patch 12
There is a custom script in a ui policy that is attempting to modify the DOM in some way. The DOM element the script is looking for could not be found.
1) Identify the ui policy causing the issue by using System Diagnostics > Debug UI Policies and observing the browser console log
2) Navigate to the affected policy and either disable it or adjust the script to ensure the element is valid before attempting to modify it