I've cloned your latest available AWS SDK to "C:\DComp\WAGNER\".
I've added: C:\DComp\WAGNER\Packages\d11\Win32\Release to the Delphi library path
Opened AWSPackages.groupproj and build each package in Release mode.
All packages build just fine except the awss3280.bpl, this one gives me the error:
[dcc32 Error] AWS.S3.Pipeline.PostMarshallHandler.pas(32): E2003 Undeclared identifier: 'THashSet<>'
In file: AWS.S3.Pipeline.PostMarshallHandler, at line #32
In Delphi 11.3 Patch 1:
Anything I'm missing or overlooking here?