Cause: DxAutoInstaller failed to compile the base runtime packages first. Fix: Run the installer again, uncheck all design-time packages, compile only runtime. Then run again with design-time.
Released in mid-2019, version 19.1.2 arrived with key enhancements: DevExpress VCL 19.1.2 Full Source with DxAutoInstaller 2.2.2
This version supports RAD Studio 10.3 Rio (and earlier back to XE2). It remains popular because it predates radical licensing changes and the removal of certain legacy controls. Cause: DxAutoInstaller failed to compile the base runtime
Create a clean folder, e.g., C:\DevExpress\19.1.2\FullSource. Extract all source subfolders (ExpressCore Library, ExpressDataGrid, ExpressLibrary, etc.) into this directory. This version supports RAD Studio 10
Supported Delphi/C++Builder Versions
Core Component Suites
19.1.2 Specific Enhancements (partial list)