chapitre1.tex, line 32 Package keyval Error: heigth undefined.
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l.32 ...[heigth=6cm,width=5cm]{img/e-commerce.png}
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11 Answer
The key defined by graphicx for specifying the height of including graphics is height, not heigth:
\includegraphics[height = 6cm, width = 5cm]{img/e-commerce.png}