I am having the same issue, due to inactivity my account/database was removed. It was working fine but after the removal I have created this new database, 2 weeks past but still having this error. I also tried to create a new one 3 days ago, used different browser, the link https://databases.000webhost.com/index.php , used google dns. No luck still.
I am using the old cpanel, I am new here please guide me too if I have done anything wrong so I can solve it. Thanks.