The reason for that is the jQuery version upgrade in latest WordPress versions and stop jQuery Migrate helper script by default.
If you have such issue, here is how to resolve:
Option 1: Enable jQuery Migrate Helper
You can install and activate a plugin which will resolve the issue:
Option 2: Upgrade to Latest Theme Version
We keep our themes up-to-date and following best code practices according to the latest WordPress guidelines. The jQuery deprecated issues are resolved in all latest theme version.
You can resolve the issue by upgrading to the latest theme version following Our Update to Latest Theme Version.
Please Note: The premium theme version is available for Download for 1 year after your initial purchase. If your download has expired, you can get latest theme version by making a new purchase on our site.