If your Brother Printer in error state you can simply restart both your computer and printer, it can be the solution to the “printer in error state” issue. Power off your printer and computer completely, leaving them in this state for a few minutes, then turn them on again to see if the problem is gone.
You can also do it by unplugging the power cord from the wall outlet and then again switching it on. You can update or reinstall the printer driver. According to many Brother Printer users, the Error State is often caused by the corruption of the printer drivers