I was able to resolve the issue by working with the following notes:
1869701 - Overview of the SLD Data Suppliers of Technical Systems
This note described the common data suppliers that were involved with the technical instance data supplier error. From there I was pointed to this note:
1717846 - sapstartsrv SLD registration
This note describes the steps to restart the sapstartsrv which then updates the slddest.cfg file. It also pointed me to the log file dev_sldregs. The log file showed that I was pointing to a legacy SLD. The note then provided instructions for updating the slddest.cfg with the new SLD URL, user and port.
Hope that helps.