5.4 Crashing when i open the Control rig and hover over the edge of the rig tab

so basically when i open control Rig, its missing the details and rig hierarchy on the left. the window tab when i drop down says those two are open. if i hover over the left most edge of the rig tab, even for a moment, the engine crashes with aa “dividing by zero” error.

i deleted the old control rig i was working on, there are no remaining references to it in the project.

i re-installed 5.4

nothing else is making it crash, no other windows, tabs, features.

one day, the darn windows on the left vanished, and then it just keeps crashing now.