Inside of the conf_global.php file, the most important thing to check is that the MySQL database info is correct. (Database name, database user, and database user password.)
If the main site is loading and you can access the ACP and main page of the site, this will be fine as you would be erroring out if it could not connect to the DB.
After the site migrated, I would suggest going to your ACP’s support section and clearing the system cache. It’s possible one of the template cache files was corrupted in the migration. Clearing the cache will rebuild those various files. I PERSONALLY would also try clearing my browser cache as well, but that may not be necessary. (I like to eliminate as many potential issues as possible in my troubleshooting!)