Please follow the following steps:1. Whether the printer is offline or not: If the printer is offline, please click the red error icon next to the device status on the home page to check the relevant processing methods.2. Whether the printer is in an error state: When a printer error occurs, the tasks in the print queue are paused until the error is cleared.3. Tasks sent by space printing: please check the image resolution, and it is recommended to use a picture with moderate resolution. If the image resolution is too large, the task will be automatically deleted by space printing.