Page not found after transfering the site

I transfer the site to a new server and I get error

Contao Open Source CMS
Page not found
What's the matter?
The page you have requested does not exist under this domain.

How can I fix the issue?
Try to go to the top level and use the search function (if any) to find the page you were looking for. You may also contact the webmaster and let him know that there is something wrong.

To customize this notice, create a custom template file named templates/be_no_page.html5.

How can I fix it?

Please elaborate what you have done exactly!