Android build freezes when using the Substance-plugin

Hey, I've been struggling with this for a few days now so I thought it would be good to ask here for a solution...

I'm building my game for Android, and I am using the Substance plugin which can be found here: https://assetstore.unity.com/packages/tools/utilities/substance-in-unity-110555
I need the Substance plugin for the asset pack I am using, because otherwise a lot of the textures get purple.

When I try to build my game (Picture 1 for settings), Unity freezes at exactly the same point every time. It does it's thing until it formats the Substance textures. It gets to 30 in about 10 to 15 seconds, but it freezes after that (Picture 2). Then, after a few seconds the scene view gets empty (Picture 3), but then it doesn't do anything, even after waiting for about 2 hours. My mac says that Unity doesn't respond anymore.

What I've tried:
- Building an empty scene (which worked as it should)
- Deleting the library folder of the project and letting Unity reimport it.
- Waiting for about 2 hours

I'm not getting anything special in the console.
Nothing works. Could somebody please help me?