Failed to fetch data from admin panel UI

[t3dkich]

Describe the bug I ran a local server on http://localhost:8000, logged in as admin. When I try to execute some request from UI - for instance "http://localhost/api/v1/about/" - get error

Failed to fetch.
Possible Reasons:
  - CORS
  - Network Failure
  - URL scheme must be "http" or "https" for CORS request.

then tried "http://localhost:8000/api/v1/about/" in the browser url bar - got the successful response info as it's supposed to be.

Are there some settings that I need to do?

Environment (please complete the following information):

• .env local
• Private chain
• OS: MacOs
• Browser Brave