When attempting to attach a photo or upload file to a record using the ServiceNow mobile app, user's may notice that nothing happens after they choose to attach via the camera feature a photo or file to upload via the file selector and the view is returned to the record.
iOS and Android devices
Not giving the ServiceNow application access to the phone's camera or file repository is likely the cause of this symptom.
You will need to access your phone's security settings to provide the necessary requirements. Another simple approach is to uninstall the ServiceNow app and reinstall it, then, when running the app for the first time - use the attach photo or file upload features and look out for and approve the app's permission requests to use the camera and access files on the phone.