TLS server credential private key fatal error

Dear,

After installing Milestone, I get the following error in the windows event log:

A fatal error occurred when attempting to access the TLS server credential private key. The error code returned from the cryptographic module is 0x8009030D. The internal error state is 10001.
The SSPI client process is VideoOS.Recorder.Service (PID: 20568).

How do I start debugging this error?

Thanks,

Bart