I am an independent third-party Brother Printer support provider. There can be different reasons too, which can cause the issue of the Brother printer in an error state. But, you shall not get disappointed as we can resolve this issue easily.
Besides, the following were the other reasons that caused the error state problem in your Brother printer.
Disabled PnP detection.Disconnected printer and computer.Sometimes, low ink levels.Paper jam in the printer.Loose printer connection. Old printer driversBrother printer is offline or paused.https://www.customerservicephonenumber.co/blog/fixed-brother-printer-in-error-state-problem/