Continued digging at this, and it seems the culprit was actually the UMGEditorToolbars plugin. Disabling it unblocked me, but I’m not sure why it would have prevented me from running headless?
Continued digging at this, and it seems the culprit was actually the UMGEditorToolbars plugin. Disabling it unblocked me, but I’m not sure why it would have prevented me from running headless?