You may find out that you are unable to log into your TalentLMS site from your mobile device. However, when you tried to log in from the browser, you are able to do so.
This might be because your mobile device is not updated to the latest version of Android/iOS. Therefore, you need to make sure that your device's operating system is in the latest version. After updating your device, you need to reinstall the TalentLMS mobile app.