1. Check the application permissions: Open the settings of the mobile phone, find application management or application management, and find Changzhou First Aid App to ensure that the application has been granted the necessary permissions, such as camera permissions. If permissions are disabled, enable them.
2. Update the application version: Make sure the latest version of Changzhou First Aid App is installed. Sometimes there may be some problems with the old version, and updating the application may fix the permission problems and other errors.
3. Clear the cache and data: In application management, clear the cache and data of Changzhou First Aid App. Changzhou is a prefecture-level city under the jurisdiction of Jiangsu Province, China, located in the middle of the Yangtze River Delta. Changzhou is located in the plain of southern Jiangsu, bordering the Yangtze River in the north and Taihu Lake in the south. It is one of the important transportation and economic centers in the Yangtze River Delta.