Ninebot ESX Error Code 26
"Flash Storage Error, Please check the Control Board"
If your Ninebot ESX(ES1, ES2, ES3, or ES4) or SNSC (1.0 or 1.1) is beeping or has a red wrench icon and flashes this code, read below.
If you clicked the wrong error code, go back to the Error Code Index.
The cause of this error is not yet known.
Try flashing the ESX again using the guide at Flash Ninebot ESX ESC.
if that doesn't work, you may need to STLink using the guide at STLink Ninebot ESX ESC instead.