pyvo queries failing with "file not VOTABLE" error

Hello. The pyvo queries that JWQL performs have suddenly started crashing with an error that "File does not appear to be VOTABLE". Here is our query:
```
import pyvo as vo
instrument = 'nircam'
proposal = 1068
tap_service = vo.dal.TAPService("http://vao.stsci.edu/caomtap/tapservice.aspx")
tap_results = tap_service.search(f"select observationID from dbo.CaomObservation where collection='JWST' and maxLevel=2 and insName like '{instrument.lower()}' and prpID='{int(proposal)}'")
```

```
E19 Traceback (most recent call last)
~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/pyvo/dal/query.py in execute_votable(self, post)
241 try:
--> 242 return votableparse(self.execute_stream(post=post).read)
243 except Exception as e:

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/astropy/utils/decorators.py in wrapper(*args, **kwargs)
545
--> 546 return function(*args, **kwargs)
547

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/astropy/io/votable/table.py in parse(source, columns, invalid, verify, chunk_size, table_number, table_id, filename, unit_format, datatype_mapping, _debug_python_based_parser)
158 _debug_python_based_parser=_debug_python_based_parser) as iterator:
--> 159 return tree.VOTableFile(
160 config=config, pos=(1, 1)).parse(iterator, config)

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/astropy/io/votable/tree.py in parse(self, iterator, config)
3599 else:
-> 3600 vo_raise(E19, (), config, pos)
3601 config.update(self._get_version_checks())

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/astropy/io/votable/exceptions.py in vo_raise(exception_class, args, config, pos)
111 config = {}
--> 112 raise exception_class(args, config, pos)
113

E19: None:2:9: E19: File does not appear to be a VOTABLE

During handling of the above exception, another exception occurred:

DALFormatError Traceback (most recent call last)
in
----> 1 tap_results = tap_service.search(f"select observationID from dbo.CaomObservation where collection='JWST' and maxLevel=2 and insName like '{instrument.lower()}' and prpID='{int(proposal)}'")

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/pyvo/dal/tap.py in run_sync(self, query, language, maxrec, uploads, **keywords)
244 TAPResults
245 """
--> 246 return self.create_query(
247 query, language=language, maxrec=maxrec, uploads=uploads,
248 **keywords).execute()

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/pyvo/dal/tap.py in execute(self)
940 for errors parsing the VOTable response
941 """
--> 942 return TAPResults(self.execute_votable(), url=self.queryurl, session=self._session)
943
944 def submit(self, post=False):

~/miniconda3/envs/jwql-py3.8/lib/python3.8/site-packages/pyvo/dal/query.py in execute_votable(self, post)
243 except Exception as e:
244 self.raise_if_error()
--> 245 raise DALFormatError(e, self.queryurl)
246
247 def raise_if_error(self):

DALFormatError: E19: None:2:9: E19: File does not appear to be a VOTABLE
```

Reproduce the pyvo TAPService query against http://vao.stsci.edu/caomtap/tapservice.aspx and inspect the returned response before VOTable parsing. Compare the response with what pyvo expects; done means the JWQL query returns observationID results without the file-not-VOTABLE or DALFormatError exceptions.

Written by the indexing model from the issue text.