When I label my PDF manually and after completing labelling when I click on Mark as labelled the button is not working I can click on it multiple times but it doesn't work the only option is to discard and go back in which my changes are lost
It seems like you're encountering an issue with a specific software or tool that you're using to label PDFs. The problem you're describing might be related to the software's functionality or a potential bug.
Make sure you are using the latest version of the software. Sometimes, software developers release updates that address bugs and improve functionality. And if you are using a web-based tool, try clearing your browser's cache and cookies, as cached data can sometimes cause issues with web applications.
If the issue continues, consider reaching out to the support team for the specific software or tool you are using. They may have insights into common issues and possible solutions. You can also file an issue in Buganizer.
Before attempting any of the above steps, make sure to back up your labeled PDFs and any other important data to prevent data loss.