Envelope.com 64 bit files “ERR: Cannot open Sentinel Run-time API for reading (819)”

When Master Wizard gets executed the latest libraries will be available in %USERPROFILE%\Documents\SafeNet\

And  envelope.com searches the hasp_windows_x64_VENDORID.dll in C:\Program Files (x86)\SafeNet Sentinel\Sentinel LDK\VendorTools\VendorSuite\

Therefore, manually copy hasp_windows_x64_VENDORID.dll to C:\Program Files(x86)\SafeNet Sentinel\Sentinel LDK\VendorTools\VendorSuite\ to resolve the issue