Zadarma doesnt work

Good morning.
I am writing this post because I am trying to link my HubSpot account with Zadarma and I am not able to.
When I click on the “Install Application” button, it takes me to the official Zadarma website but it doesn’t give me the option to allow permissions or anything similar.

I attach screenshots

Hi @DDíazAuffray

Have you checked the setup guide for the integration?

Looks like this is being setup/configured in Zadarna, before you can activate the setup wizard in HubSpot.

Frank