Getresponse not syncing with Optin Panda

Hi,
I tried using GR with your plugin but get the below error. I contacted Getresponse and they indicated that it was some upgrade issue with your plugin. Pl. suggest solutions – want to avoid using Zapier. Thanks
David, MBAadmissionGURUS

Unable to get the lists: Request have return error: API key verification failed. Response: {“error”:{“message”:”API key verification failed”,”code”:-1},”jsonrpc”:”2.0″,”id”:1}. Request: “{\”jsonrpc\”:\”2.0\”,\”method\”:\”get_campaigns\”,\”params\”:[\”ypggev4e8o57a2b4iesgo58czf2m0c4i\”,{\”name\”:{\”CONTAINS\”:\”%\”}}],\”id\”:1}”