Solution
The issue is not directly caused by the installation of the new SystemLink Server version, but by the circumstance, that it comes with a new version of NI Packager Manager. NI Package Manager versions since 2023 Q2 install the Microsoft .NET Framework 4.8.
In special scenarios, the installation of Microsoft .NET Frameware 4.8 can lead to missing registry entries. Help for the issue can be found in the
Microsoft Tech Community .