Crash of texts session with %find with incorrect query

With this incorrect (because the query must be ((meta: ((state: 'FIZZLED'))))) input:

Input > %find ((meta: (state: 'FIZZLED')))

the texts session crashes with this error:

Traceback (most recent call last):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 302, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/interpreter/session_manager.py", line 194, in process_magic
    q_dict = expand_query_prefix(tag_serialize(model.arg.value))
  File "vre-language/src/virtmat/language/utilities/serializable.py", line 496, in tag_serialize
    return _recursive_serialize(tagtab)
  File "vre-language/src/virtmat/language/utilities/serializable.py", line 487, in _recursive_serialize
    out[key] = _recursive_serialize(val[0])
  File "vre-language/src/virtmat/language/utilities/serializable.py", line 495, in _recursive_serialize
    raise TypeError(f'unsupported type for query/tag: {type(obj)}')
TypeError: unsupported type for query/tag: <class 'pandas.core.series.Series'>

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 302, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/interpreter/session_manager.py", line 145, in process_input
    self.process_magic(model)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 337, in wrapper
    raise RuntimeError('non-handled exception') from err
RuntimeError: non-handled exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 302, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/cli/run_session.py", line 93, in main
    mgr.main_loop()
  File "vre-language/src/virtmat/language/interpreter/session_manager.py", line 132, in main_loop
    if self.process_input(input_str):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 337, in wrapper
    raise RuntimeError('non-handled exception') from err
RuntimeError: non-handled exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "jupyter-tensorflow-2023-10-10/bin/texts", line 8, in <module>
    sys.exit(texts())
  File "vre-language/src/virtmat/language/cli/__init__.py", line 28, in texts
    clargs.func(clargs)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 337, in wrapper
    raise RuntimeError('non-handled exception') from err
RuntimeError: non-handled exception