Get categories via /api/jsonws request, response with 403 status

Issue

• When retrieving categories using api/jsonws there's a blank page and the HTTP status is 403.

Environment

• Liferay DXP 7.4

Resolution

• Go to Control Panel -> System Settings -> API authentication -> Portal Sessions.
• If it's empty, create a new entry and under "URLs include" set this value:

  /api/json*,/api/jsonws*,/c/portal/json_service*