The asset 'apache-maven-project-2.png' has the '.png' extension but actually it's a 'jpeg' file:
It's a minor issue, but it can become annoying if you want to optimize resource using optipng (or any other png optimizer).
There are two easy way to fix this issue:
- provide a png version of the image
- rename the asset (but also update all the references to the asset)
I've attached a png version of the asset.