A Brother laser printer paper jam can occur due to incorrect paper loading, worn rollers, or small paper fragments stuck inside the printer. Turn off the device and carefully remove any jammed paper from the tray, rear cover, or toner area. Check for hidden scraps and clean the rollers if necessary. Using the right paper type and not overloading the tray can help prevent frequent jams... https://allprintersetup.com/service/brother-printer/brother-printer-paper-jam