[devKnight]

Clicking on any of the three buttons throws up this error: Oups ! Une erreur est survenue.

[Devarel]

Yes, sorry about that, actually you need to log in and have an active subscription to use the features

[brudgers]

It's easier for people on HN to give meaningful feedback if you remove this restriction.

On the other hand, charging money is a sound way to validate a business idea...with the caveat that HN is not a particularly rich target demographic for your product.

Good luck.