Hi Gianluca (@Anonymous)
In the future, you should create a new post. First, this topic appears to be a new issue, and second, some people may not read a "solved" issue. But I will be glad to help you here (and we can create a new post if it becomes appropriate).
What version are you trying to license? Is it an ALGOR version or an Autodesk version? (Hopefully the licensing or installer will indicate specifically what version you have, or maybe the installation media will indicate the version. If none of those indicate the version, then use Windows Explorer to view the Properties of the file ssap0.exe in the installation folder. What is the "File version" or "Date modified" for that file?)
Since the feedback message specifically mentioned ALGOR, my guess is that you are using older software. Note that the company ALGOR has not existed for almost 10 years, so it may not be possible to license it any longer. (But I do not know since licensing is handled by the installation and licensing team.)
Note that the software that was ALGOR and became Autodesk Simulation Mechanical is no longer sold, so you cannot even purchase the latest software to access your models!
John Holtz, P.E. Global Product Support
Autodesk, Inc. If not provided, indicate the version of Inventor Nastran you are using.If the issue is related to a model, attach the model! See What files to provide when the model is needed.