error during installation instrumentationworkshop (unit Windows not found)

Could it be that the Windows unit is only not being found on my PC, or is this a general issue with this package?
All the other packages installed without any issues, and I’m not noticing any problems with my own programs either.


C:\T\Products\tms.vcl.instrumentationworkshop\VrPropEdit.pas(25): error F2613: Unit 'Windows' nicht gefunden. [C:\T\Temp\p\tms.vcl.instrumentationworkshop_d13_win64intel_Debug\TMSVCLIWPkgDE.dproj]Die Erstellung des Projekts "C:\T\Temp\p\tms.vcl.instrumentationworkshop_d13_win64intel_Debug\TMSVCLIWPkgDE.dproj" ist abgeschlossen, Build Ziel(e) -- FEHLER.

Fehler beim Buildvorgang.

"C:\T\Temp\p\tms.vcl.instrumentationworkshop_d13_win64intel_Debug\TMSVCLIWPkgDE.dproj" (Build Ziel) (1) ->(_PasCoreCompile Ziel) ->C:\T\Products\tms.vcl.instrumentationworkshop\VrPropEdit.pas(25): error F2613: Unit 'Windows' nicht gefunden. [C:\T\Temp\p\tms.vcl.instrumentationworkshop_d13_win64intel_Debug\TMSVCLIWPkgDE.dproj]

0 Warnung(en)
1 Fehler