Graxpert not working

1st time using graxpert and i get the attached error.
Tried running it stand-alone and got same meesage.
Uninstalled and re-downlaoded from Graxpert web site and same issue.
Any suggestions?

Are you running the standalone version of GraXpert?

Just downloaded the windows 64 version direct from the website.

Andcthen pointed to it in preferences in siril.
Tried ru ni g the .exe file directly and that gave same error

If you cannot run GraXpert by itself don’t expect having it running through Siril.