After disabling a workbench on the "Available Workbenches" tab in the Preferences Editor (Preferences_Editor#Available_Workbenches) there is an index issue if you do not restart FreeCAD.
In the Preferences Editor go to Workbenches -> Available Workbenches.
Disable the first WB in the list (Arch WB in my case).
The problem also occurs after deleting user.cfg, but I now notice that the first WB you activate after disabling a WB is correct, subsequent activations show the index error. So the steps are:
In the Preferences Editor go to Workbenches -> Available Workbenches.
Disable the first WB in the list (Arch WB in my case).
Roy_043 wrote: ↑Wed Apr 05, 2023 10:50 pm
The problem also occurs after deleting user.cfg, but I now notice that the first WB you activate after disabling a WB is correct, subsequent activations show the index error.
Did you open a ticket for this one in GH ? This is quite problematic and still unresolved AFAIK.