An unknown error occurred trying to verify the signature of the file

Acronis Cyber Protect: Remote installation fails with error "An unknown error occurred trying to verify the signature of the file"

Symptoms

Remote installation, update or auto-update of the agent fails with error:

"Installer downloaded from https://IP_address:9877/installation_files/ did not pass the verification. Downloading the installer from a trusted source. An unknown error occurred trying to verify the signature of the file"