Discord has responded to the issue on its official status website and said that they are working on a fix. "The issue has been identified and a fix is being implemented," a message on Discord's ...

Fix #1: Check the Roblox server status. In order to fix Roblox error code 524, the first thing that you need is to ensure that there’s no on-going server issues with the game.

Discord has responded to the issue on its official status website and said that they are working on a fix.