Revit 2022 - Not loading specific external application

[luke.austin]

I've been developing an application for Revit 2019-2022. The app I've made works in all versions apart from 2022, theres no clear error message.

The API has changed with every different Revit version released, I've checked what's changed but I can't seem to find anything that has with what I'm using.

There are multiple applications being loaded in, but this is the only one that doesn't seem to work.

[RPTHOMAS108]

That often points to something larger at play.

Are you targeting .netframework 4.8 for example?

[luke.austin]

Yeah, the solution is targeting 4.8