Steps to reproduce:

1. Log in to back office.
2. Go to Content / Content structure.
3. Start creating a new LP content.
4. Verify web browser console output.

Actual result:

See attached screenshot.

An error 401 unauthorized occurs on create a new landing page.

 ibexa-storefront-cart-js.js:1057 Uncaught (in promise) Error: Unauthorized
    at handleRequest (ibexa-storefront-cart-js.js:1057:11)
    at ibexa-storefront-cart-js.js:1080:12

Expected result:

No exception occurs.

Note:
I guess the error 401 unauthrorized is related to permissions with displaying the cart.

Edit:
Added ibexa.yaml configuration.