У вашего броузера проблема в совместимости с HTML5
How to Install Turbo Prolog ?
Watch this Video.
Link : https://drive.google.com/file/d/1F2iNuEohlAo-mcHpcA-Pcxxs7orn5aRb/view
1. install DOSBox
2.copy prolog folder and paste on desired drive location
3.open DOSBox and Run following command ...........
mount F F:\
F:
cd prolog
prolog.exe
now enjoy........... done