APIC-EM IWAN DEPLOYMENT FAILURE ERRORS: PKI-3-CERTIFICATE_INVALID and %PKI-3-SOCKETSELECT

I was recently doing some labbing of APIC-EM and IWAN deployments. I got to the point where my HUB was deployed, and then I attempted to deploy 2 branches but failed. I was getting these errors on my Routers: PKI-3-CERTIFICATE_INVALID: Certificate chain validation has failed%PKI-3-SOCKETSELECT: Failed to select the socket. APIC-EM seems to deploy IWAN [...]