Page experience issue

Hi guys, i'm getting this message from AMP Page Experience Guide:

```Your cached AMP page needs improvement(s).
Your AMP page from origin has a good page experience, but the cached AMP page needs work. Don't fret, we have some recommendations to help you improve! However, it's rare that we see a cached AMP page fail page experience. Please file a GitHub issue so that we can take a look and see how AMP can help.
```

url: https://me.ahazou.com/startnetvpn

Anyone can help to understand?

Start by reproducing the AMP Page Experience Guide report for https://me.ahazou.com/startnetvpn and compare the cached AMP page with the origin page. Read the reported recommendations and AMP's handling of cached pages; done means identifying whether AMP is responsible and documenting a specific, reproducible change or next step.

Written by the indexing model from the issue text.