I have a client that I've written a custom apps script for. Every time I execute it from his account (just like any other script) there is this error:
We're sorry, there was an unexpected error while creating the Cloud Platform project. Error code INTERNAL.
Executing the script from any other account works perfectly, including free ones.
I've checked their Google Admin setting, the Cloud Platform is on. It might be worth mentioning they have legacy G Suite Free.
I'd be super grateful for any help as I'm out of ideas already.