Some issue with update-notifier in panel

I installed Zorin Lite alongside Windows 10 before a couple of days. Yesterday, when my system was idle for some time, the system went to sleep mode. After logging back in, the screen was frozen (I think the system was stuck in some process). I somehow managed to turn off the system. After turning in, I see the following error for update-notifier in panel:
It says this: “A problem occurred when checking for the updates.”

Clicking any of the buttons doesn’t do anything. What’s happening here can someone please help?

Try these steps, in order:

  1. Zorin menu -> Utilities -> System Monitor -> Processes and kill the update-notifier.
  2. Search for update-notifier in Synaptic and Reinstall.
  3. Check your updater settings and run the updater: Software Updater settings

Thanks for the quick response. But while installing another software, the terminal gave me an error “ImportError: No module named ‘apt_pkg’”. I had updated python 3.6 to 3.8, which resulted in all this mess. I managed to update apt_pkg using this solution. As soon as apt_pkg was updated, the update-notifier error was gone.

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