Bad Gateway Error when trying to open a site: What could be wrong?

[Kera]

I tried to open a popular site for more than 24 hours now. And it is showing Bad Gateway Error. What could be the reason for that kind of error? What are the possible ways to resolve it and make the site accessible again?

 

[monster_masterpiece]

The site is under maintenance simply.

 

[Starmix]

The site might be hibernating. Try to check it after 24 hours. You can also check it on the web to get feedback from other users.

 

[monster_masterpiece]

The site might be hibernating. Try to check it after 24 hours. You can also check it on the web to get feedback from other users.

Maintenance could be up to 72 hours depending on what they maintain exactly.