Add a Teams Tab/App to a private channel

[Carl__D]

Hello, 

I have a flow that provisions new Teams along with various Teams settings, private channels etc. 

I would like to programmatically add a Tab to the Team with a custom Team app - I can do this in Graph and in a new test flow, but when I add it to my provisioning flow I keep getting this error: 

{
"error": {
"code": "BadRequest",
"message": "App id {abc12} needs to be installed to the scope {abc12}@thread.tacv2 and be in an unblocked state to install/update a tab",
"innerError": {
"message": "App id {abc12} needs to be installed to the scope {abc12}@thread.tacv2 and be in an unblocked state to install/update a tab",
"code": "InvalidRequest",
"innerError": {},
"date": "2022-06-14T14:48:21",
"request-id": "{abc12}",
"client-request-id": "{abc12}"
}
}
} 

This is the HTTP call that works alone, but not as part of the entire flow: 

I have used this as a referance: https://docs.microsoft.com/en-us/graph/api/channel-post-tabs?view=graph-rest-1.0

Does anyone know what the 'App id needs to be installed to the scope and be in an unblocked state to install/update a tab'

is referring to?

Any help/advice appreciated. 

Thanks

Car

[Carl__D · Accepted solution]

Worked it out - had to add 'installedApps' HTTP action first then update the Registered App permissions accordingly in Azure: