Endless loading of goods order on OpenCart, what is the reason?

Question

opencart

After transferring the site to another hosting (to Beget), an order began to be issued endlessly. That is, when you click on the "Confirm Order" button in the checkout, the download icon appears in this button and hangs.
The transfer was carried out by the host. What is the problem and how to solve?
500 (Internal Server Error) console shows

Answer 1

Hosting also provides server logs, where it will be indicated what causes the error