401 API error when setting post like/vote score to 0

[kgilles]

When a user submits a vote/like for a post a request is sent to the /api/v3/post/like route with an example payload such as

{
    "post_id": 32,
    "score": 1
}

This works well when up- or downvoting a post. Ie. sending in a score value of 1 or -1. But when sending in a score value of 0, the API always responds with a 401 Unauthorized error.

Reproduce

1. Login as a non-admin user
2. Find or create a post
3. If in frontend UI, click the upvote button twice (can use Postman or similar program for this)
4. The first click, the vote score of 1 goes through fine
5. The second click, the vote score of 0 causes 401 error

[Pdzly]

Same issue on comment vote