`illust_comments` returns `<Response [404]>`, even though `illust_detail` is okay

[Danipulok]

MRE:

from pixivpy3 import AppPixivAPI

ACCESS_TOKEN = "xxx"
REFRESH_TOKEN = "yyy"

client = AppPixivAPI()
client.set_auth(access_token=ACCESS_TOKEN, refresh_token=REFRESH_TOKEN)

# Tested on those 3
# illust_id = 125723831
# illust_id = 125478796
illust_id = 124297432

details = client.illust_detail(illust_id)
print(details)  # OK
comments = client.illust_comments(illust_id)
print(comments)  # <Response [404]>