In Most of the latest version of chrome is not there so Update the chrome by following these steps:
Step 1: To update the Chrome Browser, go to the upper right corner of the browser and click the three vertical dots.
Step 2: Select Help from the context menu, then About Google Chrome from the left-hand sub-menu.
Step 3: Google Chrome begins to update itself. To make the update take effect, click the Relaunch icon next to it and restart the browser.
This should fix the problem of your PDF not opening.
