Enabling monitoring results in a Terraform error when planning/applying

When instantiating the gcp-cloud-run-app module in a project, specifying the option disable_monitoring = false results in the following error when performing a terraform plan or terraform apply:

Error: project: required field is not set

  on /terraform_data/modules/webapp.uptime_monitoring/locals.tf line 5, in data "google_project" "provider_project":
   5: data "google_project" "provider_project" {}



Error: project: required field is not set

  on /terraform_data/modules/webapp.uptime_monitoring/main.tf line 8, in data "google_project" "project":
   8: data "google_project" "project" {}

Observed with Terraform 0.14.