Let me tell you about 504 Gateway Time-out problem when opening Solid Trust Pay website. The reason I'm writing this post is hundreds of visitors coming to my blog My Online Stay to know about this issue. There is nothing to worry about. A 504 Gateway Time-out error usually means the server upstream is either down or too
slow to fulfill the request. Unfortunately, you cannot do anything to solve a 504 gateway
timeout problem. It has to be dealt with by the techies at the ISP that
hosts the web server.
Visit the below link to know about this issue in details.
