Custom Card not displayed for Deals

[PHeuer]

Hi everyone,

I am trying to add a custom card in the detail view of a deal (via private app). I used a template from github which I extended as follows:
- in app.json I added the scopes "crm.objects.deals.read" und "crm.objects.deals.write" 
- in crm-card.json inside "objectTypes" I added another object: { "name": "deals", "propertiesToSend": [] }

It works without a problem when using contacts or companies, but does not work for deals. 

I'm thankful for any tip!

Thank you!