Cant find unit "windows"

Dear support team,
after insert an "WebResponsiveManager" component on the form I
get the error when compiling:
[Fehler] C:\Delphi 11\TMS\webcore\Core Source\WEBLib.TMSWEBTypes.pas can't find unit "Windows"

without then WebResponsiveManager it works....

Make sure your unit scope names are setup correct.
These should include:
Winapi;System.Win;Data.Win;Datasnap.Win;Web.Win;Soap.Win;Xml.Win;Bde;System;Xml;Data;Datasnap;Web;Soap;Vcl;Vcl.Imaging;Vcl.Touch;Vcl.Samples;Vcl.Shell