Who Me Too'd this topic

I'm writing a simple application that calls the /v1/recommendations endpoint and a few others. The app is in very early development mode--I'm the only "user" while I'm developing and testing.

Now it seems my app is rate-limited for the /v1/recommendations and /v1/recommendations/available-genre-seeds endpoints, even though it worked yesterday. When I call them (using the spotipy wrapper), I either get read timeouts or this exception is raised:

"""
spotipy.exceptions.SpotifyException: http status: 429, code:-1 - /v1/recommendations?limit=100&seed_artists=... (etc)
Max Retries, reason: too many 504 error responses
"""

So, two questions:

1) I'm a little confused about the primary cause of the 504 status. Did I call the endpoint too many times? Or would the 504 be a gateway error unrelated to my code? Or something else?
2) If my app is rate-limited, how long would I have to wait before making another call to /v1/recommendations endpoints to ensure that read timeouts, 429, and 504 are not received?