Searching for '*' in the search api returns 0 results

This request should return all jpg assets but returns 0 results. (this used to work, but doesn't work anymore)

Any ideas?

Requets:
curl --location 'https://api.dropboxapi.com/2/files/search_v2' \
--header 'Authorization: Bearer sl.BzCOB6xVGXCxDTFiA4UQVtdcxTjaio7RIM4_8NnHHuMlrXkiyhvdtD6fKK8xmdCzWOJo0AbFcNzVym--OCYucSJev8YiVGK65d7BYtpT6SfdcivdISN7lC1KvG3TiOFFhv6gTgKVU788Spc' \
--header 'Content-Type: application/json' \
--data '{"query":"*","options":{"file_extensions":["jpg","jpeg"],"max-results":50}}'

Response:
{"has_more":false,"matches":[]}