Hi Steven,
I have done everything what you mentioned but still getting the following error:-
Warning: require(/home/g7r5j749imhe/public_html/wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php): failed to open stream: No such file or directory in /home/g7r5j749imhe/public_html/wp-settings.php on line 232
Fatal error: require(): Failed opening required ‘/home/g7r5j749imhe/public_html/wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php’ (include_path=’.:/opt/alt/php72/usr/share/pear’) in /home/g7r5j749imhe/public_html/wp-settings.php on line 232
Also unable to open https://www.domain.com/wp-admin/upgrade.php Also I did not change anything in old config.php file.