The reason and solution of this prompt message is: 1, the brush package is not officially designated or does not match the mobile phone, which leads to this prompt. In this case, you should visit Xiaomi's official forum, select the corresponding brush package according to the corresponding model, download it to your mobile phone or computer, and then brush it. 2. In the process of downloading, some files of the brush package are lost or wrong, which leads to the incompleteness of the brush package, so this error prompt appears during the brush process. In this case, you need to visit Xiaomi's official forum, download the complete brush package of the corresponding model again, and then brush the machine again.