Had another go at it after updating again. Here's what I've found:
- qrc file issues are gone. No error message that the qrc can't be found - that's a win.
- Created six hal LEDs - 3 in main window user tab, 3 in sidebar user tab
- All six LED hal pins are present in halshow - still good
- main window user tab LEDs are displayed
- sidebar user tab does not display LEDs or anything else (Qlabels)
Poking around in the editor, it looks like the sidebar user tab selector button is linked to "page 3" of the stack widget, which should correspond with the 4th page (page-0 being 1st).
When selected, the user sidebar tab is empty, so I think that confirms the right stack page is being selected, but the user ui file isn't being loaded.
No error messages in terminal during startup, and I didn't change any file names or paths from the templates.
The only thing suspicious I can see is what looks like an 'inactive' icon next to the sb_page_4 object in the object window. Or I'm misinterpreting the icon - not sure.