Adrian,
This error means the Elbrus COM server was not registered with the OS. What OS are you using? How did you install Elbrus? Where did you install Elbrus?
Also… you will need to ensure that you can get Elbrus to work outside of SGPro before we can proceed with further trouble shooting here. If, for a given image, you can solve it from within the Elbrus app, but not from SGPro on the same computer, we can troubleshoot further.
Ken