After upgrade 4.16.3->4.17.2: LogStreaming: Error: Couldn't find file for package /Script/MyPlugin requested by async loading code. NameToLoad: /Script/MyPlugin

Just upgraded my project from 4.16 to 4.17. It is a C++ Project. From within the editor everything is fine. But after packaging i get the above error in the log when starting the game(it crashes, and callstack is somewhere deep in the asyncloading code of UE). MyPlugin is a plugin(c++) i added to the project while on 4.16. It has a StaticFunctionLibrary. Did anything crucial change. Something i need to do? Because it seems only my but no thirdparty plugins(which i updated) seem to have any problem.

Sorry to say, but at the moment the project is closedsource, and i have to aks before posting any logs. So that’s all i can give for now(i know quite foggy, but maybe someone else had the same problem with one of his plugins)

Okay seems i found it:
The plugin in question, when added long time ago, had its property “Type” set to “Developer”. We create Debug/Development packaged builds atm. For some reason this workend prior to 4.17, or for some reason it doesn’t anymore. Changed the type to “Runtime” and it runs again.