There are a number of reasons why a Brother printer might not be able to connect to WiFi. This prevalent issue may arise from obsolete firmware, wrong configurations, or network issues. You may need to check the Wi-Fi password, make sure the printer is within range, and troubleshoot your Wi-Fi network in order to resolve it. Reinstalling the drivers and updating the printer's firmware can also be beneficial. Depending on the model of your Brother printer, the exact procedures to fix this problem may differ. To reconnect your printer to Wi-Fi, refer to the printer's manual or Brother's help resources.