IOS: correct error messages
IOS: correct error messages

cordova-plugin-camera-preview/cordova-plugin-camera-preview,cordova-plugin-camera-preview/cordova-plugin-camera-preview,mbppower/CordovaCameraPreview,bvx89/cordova-plugin-camera-preview,hug963/CordovaCameraPreview,hug963/CordovaCameraPreview,bvx89/cordova-plugin-camera-preview,mbppower/CordovaCameraPreview