We could see this error when deploying a stack in AWS that contains an App Flow block. If we are doing through Cloudformation it’s possible we have added a new mapping to a field that doesn’t exist in Salesforce.

Let see an example of error

In this case, Field1__c and Field2__c are being mapped in App Flow but those do not exist in Salesforce or at least App Flow doesn’t have permissions to access them.

Resource handler returned message: “Invalid request provided: AWS::AppFlow::FlowCreate Flow

request failed:

[

Task Validation Error: The following connector fields are not

supported: [Field1__c, Field2__c]

The task sourceConnectorType is FILTERING and the task operator is PROJECTION,
Task Validation Error:

The following connector fields are not supported: [Field1__c]

The task sourceConnectorType is MAPPING and the task operator is NO_OP,

Task Validation Error: The following connector fields are not supported:

[Field2__c] The task sourceConnectorType is MAPPING and the task operator is NO_OP

]

(Service: Appflow, Status Code: 400, Request ID: xxxxxx-xxxx-xxxxx-xxxxx-xxxxxxx,
Extended Request ID: null)" (RequestToken: xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxxxx,
HandlerErrorCode: InvalidRequest)

Verification checklist

• Make sure the field exists
• Make sure you don’t have a typo in the field name
• Make sure the user used for the OAuth connection has necessary permissions. You could check Field-Level security or an existing permission set
• Try to recreate the connection and deactivate/activate the App Flow