permalink : /amp vs ?amp

Hi,

I Have the last version of AMP : 0.5.1

But I don’t understand why the link to the amp version include in the code is :

<link rel=”amphtml” href=”https://www.motoblouz.com/enjoytheride/test-equipement-moto/11338-sac-a-dos-dxr-over-craft-2017-08-17/amp”&gt;

This link doesn’t work

But this one actually works: https://www.motoblouz.com/enjoytheride/test-equipement-moto/11338-sac-a-dos-dxr-over-craft-2017-08-17?amp

I have finished the set up by updating my permalink.

So what’s the prob ?

The page I need help with: [log in to see the link]