Have you tried clearing the Google app Cache. To do so long press on Google app, tap on App info, then tap on Storage and tap on clear Cache. If it doesn't help then also try to clear device Cache to do so follow the instructions in the link:
If not also try, long press on Google app and tap on l App Info in top right you'll see three dot tap on it and select Uninstall updates. And see if it works if it works then don't update the app right away wait for the new update to show up and try that version and see if it doesn't have same issues. You can update the app from Google store if you want.
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