Alright, so, for the past two days, around 5 times a day, for around 1-1.30 hours, I can't access the .com site while having the error above. I have no idea whether or not other people experienced the same problem. One thing I know for sure - this is a server-side problem. Either the site is overloaded, or there are some miscommunications between nginx/1.14.0 (Ubuntu) with (probably. This is only a guess) nginx not being able to access some part of the backend service. Anyway, I have no idea whether or not other people experienced this, but if I am the only one, then this problem is quite weird. By the way, I am a newbie to this site, so I have no idea if this happened before or not - I just know that this is not supposed to be the client-side error, but the server side.
Customer support service by UserEcho