How to get rid of error 500 when transferring a site?

Question

CMS

Hello. You need to move your site from hosting to another. The problem is that a 500 error appears after the transfer . The site is not small. Moved the site theme (uploaded /wp-content/themes/ here), plugins (uploaded /wp-content/plugins here) and other files responsible for seo (uploaded to /public_html/) . And the database was also flooded (the old site address in the database was changed). So, as soon as I change the database in wp-config.php, this error immediately occurs. What can be done ?

Answer 1

logs

Answer 2

Try to better use the plugin https://ru.wordpress.org/plugins/duplicator/
More chances of success with little experience.
Or you need to debug and read the logs. There can be 1000 reasons. And telepathy here is difficult to solve the problem.