I always have the same error trying a checkout in powershell:
Invoke-DSPamCheckout -PamCredentialID 'c45571fb-6cbe-4e8b-a77c-7b060dde21db' -verbose
VERBOSE: [Invoke-DSPamCheckout] Beginning...
Invoke-DSPamCheckout: Object reference not set to an instance of an object.
Tied with a domain user with right on pam user and also with a local (dvls) admin.
Hello Pierre,
I just tried on my end with the PS module version 2023.2.0.6 and Devolutions Server 2023.2.7 and it works correctly. Could you please specify your versions?

Best regards,
Richard Boisvert
Module : 2023.2.0.6
DVLS: 2023.2.6.0
Je viens de réessayer dans un autre environnement avec les mêmes versions et ça fonctionne! Comment diagnostiquer l'environnement problématique?