This text was on the 524 error page I saw:"If you're the owner of this website:The connection to the origin web server was made, but the origin web server timed out before responding. The likely cause is an overloaded background task, database or application, stressing the resources on your web server. To resolve, please work with your hosting provider or web development team to free up resources for your database or overloaded application. Additional troubleshooting information here."
That does not mean that S2 is the cause of this error. Looks like something else may be going on. Try disabling all your plugins and see if you have the same error coming up. Web search mentions: The most common causes for Error 524 are:
- A long-running process on the origin web server, such as a slow application or database query, for which the web server must wait before it can respond to a request.
- An overloaded origin web server.