The error message you’re encountering indicates that the workflow is attempting to use a credential that either doesn’t exist, has been deleted, or doesn’t match the expected authentication type.
In n8n, each credential is assigned a unique ID. When a node references a credential by its ID, n8n expects that credential to exist and match the specified authentication type. If the credential has been deleted, renamed, or if its type has been changed, you’ll encounter this error.
- Verify Credential Existence and Type:
- Navigate to Credentials in the n8n interface.
- Ensure that the credential with ID
ABCABCABCABCexists. - Confirm that its authentication type is set to HTTP Basic Auth.
- Reassign the Credential in the Node:
- Open the node that’s producing the error.
- In the Authentication section, select the correct credential from the dropdown list.
- Avoid manually entering the credential ID; instead, use the UI to select it.
- Create a New Credential (if necessary)
Some related thread, hope helps!