Cannot create/delete post categories

Hi Team,

I’m using Zigcy Lite for my WordPress site, but after installing your theme, the Categories page in the admin panel works wrongly.

When trying to add a new category, an “undefined” error is shown at the top of the page and nothing happens, but after refreshing the page, the new category appears.
When trying to delete a category, an “Something went wrong.” error is shown and the same behavior as adding, I have to refresh the page to see the change.

This issue is only happed after I installed this theme. There is no issue with other themes.

My WP version: 5.7.1
My Zigcy Lite version: 2.0.7

Thank you in advance!