JSONDecodeError from cache browsing sub-divisions

[DaxServer]

Hi.

While browsing https://osm.wikidata.link/browse/Q677037 the software errored out. Here is the trace printed.

Software error: JSONDecodeError
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Traceback (most recent call last)
File "/usr/lib/python3/dist-packages/flask/app.py", line 1463, in wsgi_app
  response = self.full_dispatch_request()
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/flask/app.py", line 872, in full_dispatch_request
  rv = self.handle_user_exception(e)
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/flask/app.py", line 870, in full_dispatch_request
  rv = self.dispatch_request()
       ^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/flask/app.py", line 855, in dispatch_request
  return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/edward/src/owl-places/matcher/view.py", line 1623, in browse_page
  for entity in wikidata_api.get_entities_with_cache(contains_qids)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/edward/src/owl-places/matcher/wikidata_api.py", line 156, in get_entities_with_cache
  entity = json.load(open(cache_filename))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/json/__init__.py", line 293, in load
  return loads(fp.read(),
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/json/__init__.py", line 346, in loads
  return _default_decoder.decode(s)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/json/decoder.py", line 337, in decode
  obj, end = self.raw_decode(s, idx=_w(s, 0).end())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/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)

Error in function "raw_decode": Arguments(args=['self', 's', 'idx'], varargs=None, varkw=None)

{'idx': 0, 's': '', 'self': <json.decoder.JSONDecoder object at 0x7f966ed2dcd0>}