Request location prices error: invalid response

[tgamauf]

A couple of calls to request_location_prices calls failed in an ~2h window around 27.4.22 17:18 with the following error:

Expecting value: line 1 column 1 (char 0) : Traceback (most recent call last):
File "/home/app/web/.local/lib/python3.9/site-packages/django_q/cluster.py", line 432, in worker
res = f(*task["args"], **task["kwargs"])
File "/home/app/web/spritstat/services/price.py", line 114, in request_location_prices
prices = _request_prices(url)
File "/home/app/web/spritstat/services/price.py", line 136, in _request_prices
json_data = _execute_api_request(url)
File "/home/app/web/spritstat/services/price.py", line 157, in _execute_api_request
json_error = json.loads(r.data.decode("utf-8"))
File "/usr/local/lib/python3.9/json/__init__.py", line 346, in loads
return _default_decoder.decode(s)
File "/usr/local/lib/python3.9/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/local/lib/python3.9/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

As this was an ephemeral error it is most likely caused by an server error, but needs investigation.