Reason: The Meta4 Clickonce Launcher extension, which should be available for e-signature in the Google Chrome browser, does not work effectively. Even if the extension has been added before and there is an icon ( ) next to the Bookmark This Page ( ) button at the top right, the Meta4 Clickonce Helper Uninstall program must be included in the Programs list.
Solution: In this case, what needs to be done is to click on the extension icon on the right side of the address bar, remove the extension with the Remove from Chrome button and add it again. After clicking the Add to Chrome button, when you open and run the exe extension file downloaded to your computer, an information message will appear on the screen that it has been successfully added.