Integration: Failed to Successfully Connect Infusionsoft API V2 - Verify Access Details Clickfunnels to Keap

Hello I am getting an error message that states “There was a problem creating the integration: Failed to Successfully Connect Infusionsoft API V2 - Verify Access Details” Can someone please direct me as tohow to fix this? I have added and deleted several keys trying to get this to work. Please help. Thanks a bunch.