List does not exist. The page you selected contains a list that does not exist. It may have been deleted by another user.

When we save webpart to a file or site gallery and then reuse that on other page, it throws error like the following:

Solution:

Go to that list/webpart, create a new view.

Create the view using "Standard View" as below:

Give a view name and select the style "Basic Table":

It must be "Basic Table". Don’t worry it will be normal automatically when you add this webpart later.

Then save the view.

Modify the view using SharePoint Designer and save to file or save to site gallery as follows:

Then import the webpart in the page where you wanted. Be careful about the security on this library. If needed review the permission for that list/library/webpart. Imported/uploaded webpart will be available on the Miscellaneous menu on the left as follows:

All done!!!