The full issue : Variable "$input" got invalid value {"workspaceSlug":null,"clusterName":"default","serviceName":"default","stageName":"default"}; Expected non-nullable type String! not to be null at value.workspaceSlug.
when I commanded git push heroku master.
I was struggling to find where is workspaceSlug value in prisma settings page but it was already in content and even couldn't be changed. What sould I do?