Well, you can try just restarting the phone. If that doesn't help, check both the phone itself and also the Chrome app for updates. Should that even not work, I would start to wonder if there is something on the device that shouldn't be (virus, malware, bad app, etc.). Try checking for all that and if anything is found fix and/or remove it.
Once that is all done, if you are still having issues, you may need to uninstall the Chrome app. Not shut it down or delete the icon but completely uninstall it, then restart the phone and download and install the app from Google Play Store.