Hi David,
Hope you are keeping well.
I need to clarify few things:
1- Are you facing this error when you login is Sentinel Envelope or
at protection time?
2- Which type of HL dongle is connected on server (Network Dongle
or Developer Key or Master Key)?
3- Is dongle visible in ACC "http://localhost:1947/_int_/devices.html"?
4- Install any local license on target machine with same feature
that is required for envelope and try to protect application.
Thank You,
Anubhav