This warning only shows on List v3 when the task table loads, and the Debug Log is disabled:

Evaluator: org.mozilla.javascript.EcmaError: "RP" is not defined. Caused by error in sys_ui_list_control

1- Activate the plugin com.glide.ui.list_v3
2- Log out and log back in order to see list views in list v3.
3- Navigate to System Diagnostics > Session Debug > Debug Log.
4- On the Navigator Menu filter box, type task.list.
5- Press Enter.
6- Search on the page (ctrl +f) for ["RP" is not defined] (without the brackets).
Observe the error below in the instance logs:
Evaluator: org.mozilla.javascript.EcmaError: "RP" is not defined. Caused by error in sys_ui_list_control.e55cc5eb47b02200e0ef563dbb9a7166 at line 1 ==> 1: var view = RP.getParameterValue('sysparm_view'); 2: var answer = false; 3: if(view == 'my_request') { 4: answer = true;

This warning is raised whenever a UI Macro references "RP", however the code referencing RP does work, it just also adds a warning to the server log.