DRM_E_INVALIDLICENSESTORE

Code: 0x8004c019 (2147794969)

As HRESULT:

S: 1 (Failure)
C: 0 (Microsoft-defined)
N: 0 (Not an NTSTATUS value)
Facility: 0x004 (FACILITY_ITF: COM/OLE Interface management)
Code: 0xc019 (49177)

As NTSTATUS:

Sev: 2 (STATUS_SEVERITY_WARNING)
C: 0 (Microsoft-defined)
Facility: 0x004 (FACILITY_IO_ERROR_CODE: Input/Output)
Code: 0xc019 (49177)

Documented in Win32

Error Codes (Windows Media Device Manager 11 SDK): 0x8004c019

The license store version number is incorrect, or in some other way the store is not valid.