Mariadb Task showing bad gateway

I have completed all the tasks and have updated the .php file. When I go to open and view on port 80 I keep receiving a 502 bad gateway error message. Is there maintenance going on with the website. The task expires tomorrow and I would like to verify so that I can receive credit.

@asmith1027 Hello, Have you succeed ? I m also getting the same.

change wp-config.php with database server detail
In wp-config. php set debug to true so you get to know where exactly the problem is.