Does this work only for the already released “Stable” versions and any Slicer “Preview” releases prior to the transition to the updated Extension Manager infrastructure? Date?
I downloaded Slicer 2021-08-24 revision 30133 from the Applications/packages/Slicer/draft/30133 directory and then download the SlicerDebuggingTools extension in the Applications/packages/Slicer/draft/30133/extensions directory. I then installed Slicer and then followed the instructions to manually install the extension. Upon doing so I get the same results as I posted about at Unable to manually install extension to manual Slicer build.