How to remove iframe when re-rendering page in react?

Question

React

An iframe began to appear in full screen every time I edited the site code. Disappears after update.
Inside the frame is an empty body and script. It has a comment.
For license information please see iframe-bundle.js.LICENSE.txt
Nowhere is there a solution to this problem, maybe someone met how you fixed it?

Answer 1

Found a solution.
Just update react-scripts to version 5 if not manually updated in package.json file and npm i