The new URCaps Starter Package for SDK 1.4.4 resolved this issue.
You can find the latest starter package here: Download Center
If running in your own Linux OS, this issue may be caused by runit.
Consider following these steps to resolve the issue.
The issue is not directly related to PolyScope, but rather the configuration of the Linux machine.
When looking at the above linked steps, particularly the hostname and installation of runit will have an impact.
Furthermore, it is not recommended, to start URSim as root, as this will cause PolyScope to have other issues.
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