I have same problem. I solved it myself & it will also work for you.
1. Open your wp-config.php
& search the word DB_NAME, here you may see the DB_NAME name is “wordpress”
2. Change the DB_NAME wordpress to your Data-Base Name. For example my Data-Base name was “budget-rental” and I changed it by define('DB_NAME', 'budget-rental');
Hope it will work, if not, you can mail me: [email protected] & I will try to solve your specific problem. -Thanks