Steam > steamapps > common > Zenimax Online > The Elder Scrolls Online > game > client > eso64.exe Open the libraries icon at the taskbar and follow this path. However, the default folder for the Steam folder is C: > Program Files (x86). Faulty servers are something you can’t avoid or influence in any way but there is a way to launch the game using the game’s default launcher.
If you are playing the game using the Steam launcher, it may have occurred that the error is caused by faulty Steam servers which were unable to handle the traffic they were receiving.