Why is the main page not available when transferring to another domain?

Question

opencart

Moved site to another domain.
Site on OpenCart.
After the transfer, the main page became unavailable. Writes "The requested page was not found!".
At what address index.php?route=common/home page is available.
Other pages work fine. This situation does not depend on the "Enable CNC" switch.
Deployed this site in Denver, everything is fine.
Tell me, please, in which direction to look ???
Maybe something is missing on the server...

Answer 1

1. Enable error output.
2. Correct the config.php files in accordance with the settings of the new server.