Hello! How are you trying to solve a Grasshopper definition? While it could be many things, when I see the PAL_SEHException it means that for some reason Rhino can’t find a RHINO_TOKEN. If you followed the instructions, then you would have set the RHINO_TOKEN (that you get by creating a CHB account) in /etc/rhino-compute/environment and both the VM (via sudo systemctl start rhino-compute) or the Container (via rhino-compute-start) should source that file which would make the environment variables available.
If you are trying to solve a gh definition in some other manner, like via your own custom application, then you’d need to set those environment variables somewhere (like ~/.profile) and source the file (like I mention here).