I have an error witht the integration plugin, when someone

I have an error witht the integration plugin, when someone tries to send a ticket, will get this page:

https://www.evernote.com/shard/s262/sh/6662eaeb-6859-4d55-8c95-75378f96d93f/0683e9ff20f8b8d76bb8d1c9b5f35d39/deep/0/Mi-Cuenta---AMITOSAI---Online-Marketing-&-Hosting.png

As you can see in the capture, the form is totally outside the site.

How can I fix it?

Other sections like "my account" works ok