Give admin username-password to your trusted ones. so they will help you in making.
Number of directories can make it helpful. Make different names from different directories and different database names make it completely working.
There can be permission problem. Give permissions to upload folder.
See the database connectivity.
Change the password from phpmyadmin and try to log-in.
see the wp-config.php & check the database connection.
Hostname, username password, database name should be correct.
