iPaaS Connector Problem

In iPaaS I made a new connector using the standard  REST API Service connector.  The new connector uses a Generic OAuth 1 credential.  If I use action that has no parameters and doesn't pass anything in the body it works successfully.  But when I try to use an action that has parameters or a content passed in the body I get the following error:

    Re-authorization: Cannot re-authorize credentials. Unknown: . Initial response:

I contacted the vendor who's API I was trying to use and we did some trouble shooting.  When I get the Re-authorization error the API server is not getting accessed at all, so the error seems to be coming from iPaasS.  I'm getting the same error using the Amazon S3 connector.  In that case, I can get a list of objects in the bucket but when I try to get on object from the bucket I get the Re-authorization error.  

For both credentials (the OAuth 1 and S3) if I try to reauthorize the credentials in iPaaS, it tells me:

    An error occurred while verifying the credentials. Re-authorization not available for the authentication method used to create the credential.

What do these error messages mean and how do I fix it?