Now I got the following message after click on the SEND button:
Attackers might be trying to steal your information from exchange.adalite.io (for example, passwords, messages, or credit cards). Learn more
exchange.adalite.io normally uses encryption to protect your information. When Google Chrome tried to connect to exchange.adalite.io this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be exchange.adalite.io, or a Wi-Fi sign-in screen has interrupted the connection. Your information is still secure because Google Chrome stopped the connection before any data was exchanged.
You cannot visit exchange.adalite.io right now because the website uses HSTS. Network errors and attacks are usually temporary, so this page will probably work later.
This is too much for a newbie to take!