Hi,
It seems that some of the trial environments created (at least within geo Europe) from https://trials.dynamics.com get corrupted right from the start if you set them up with all of the Dynamics 365 Enterprise Applications.
You will notice the problem once you try to publish any customizations. Power Apps Maker will fail with the following error message:
Failed to process metadata description - Name: EntityKey, ID: d2ca1b83-be8e-42c9-ac22-17aca22fa8c4
You will get the same error message using the Classic colution explorer. From there you can access a more detailed error message:
Microsoft.Crm.CrmException: Failed to process metadata description - Name: EntityKey, ID: d2ca1b83-be8e-42c9-ac22-17aca22fa8c4 --->
Microsoft.Crm.CrmException: Failed to process metadata description - Name: EntityKey, ID: d2ca1b83-be8e-42c9-ac22-17aca22fa8c4 --->
System.ArgumentException: An item with the same key has already been added.
Checking the EntityKey table with XrmToolBox shows that it has an apparent duplicate:

As said, this does not seem to be happening with all the trials. From last week's training/testing session it seemed that about 30 % of trials created had this.
One workaround is to delete the environment and create one without any of the Dynamics 365 apps. However, then it is not a Dynamics 365 Trial anymore...
Any ideas on how to fix the problem?
Tommi