Arcade Hero: Building Blocks Cloud Run functions require Eventarc API

[LarryPotter]

There are four labs in May '25 Level 3 building blocks game, which have two cloud run functions.

In each Lab the first task is fine, but the second task is triggered by Pub/Sub.  But when I try to use a Pub/Sub Trigger, it tells me I need to use the Eventarc API...  But the Lab account does not have permission to enable the Eventarc API.

Am I doing it wrong? could someone point me in the right direction.