Firebase/Google Analytics Console - Internal error creating custom definitions

Question

Some hours ago, I exceeded the Firebase Analytics' quota, which let us to create 50 event scoped dimensions...

I have decided to archive some of them, with a bit of abstraction, in order to be able to create more. Now, my quota indicates:

Event dimensions: 32 / 50.

Ok, but why am I getting the error

Internal error, try again later.

?

1. I have no ad-block extension in my browser.
2. I haven't change the IAM configuration of my service account.
3. I can create custom metrics, but not event scoped dimensions.

I have been waiting 5 hours... also, I tried to clean the cookies and cached data of my browser, and to connect to a different WIFI connection.

What should I do?