I've successfully debugged add-ins in the past by following this guide: Redirecting…
Now, any new add-in I try to debug fails. I add it into the administration tool just fine, but when I start the debugging app, browse into my vault and right click (to generate the menus), I get an error saying "Failed to load add-in <name of new add-in only>. Class not registered." I don't get this error if I try to load it as a regular add-in (instead of debug), which is odd. Any ideas?
Using SW2017 SP4.0.