Our company uses Marketo as a customer integration with the application our company supports. I don't know a lot about SOAP and APIs, ect, but the integration is used with these account details:
- Marketo Account Number
- Marketo Encryption Key
- Marketo SOAP API Endpoint
- REST API Endpoint
- REST API Identity
When a user processes the request for a test email campaign, the Error Message 20133 - Invalid Import List Header is always the ending result.
Can anyone tell me what this error is and maybe how to resolve the issue? I would greatly appreciate it!