Build issue withiOS

I am facing a new error when building iOS Ad Hoc application. The project was compiling OK until few days ago, and now with the same project (NO modifications), I get the following error

I am using this version of App Inventor:
image

Anyone facing such issue? What does it mean exactly?

Thanks a lot

To wait the MIT solution you can delete the icon app of your App and after the builder will runs well to generate the IPA object.

Now is running well and I can have the Icon App on the Project Propierties.

Good news. Thanks a lot