Preconditions:

• Clean installation of Ibexa DXP on branch v4.3.x-dev

Steps to reproduce:

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

Actual result:

See attached screenshot.

JavaScript exception occurs on create a new or edit already existing LP.

Uncaught (in promise) Error: Request failed with status code 500
    at e.exports (axios.min.js:2:8028)
    at e.exports (axios.min.js:2:13086)
    at XMLHttpRequest.y (axios.min.js:2:6627)

Expected result:

No exceptions occurs.