KeyError when running summary pages on a combined metafile

When trying to make summarypages from combined metafiles using the master environment, @richard.udall find the following error:

Traceback (most recent call last):
  File "/home/richard.udall/pesummary/bin/summarypages", line 11, in <module>
    load_entry_point('pesummary==0.5.3', 'console_scripts', 'summarypages')()
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/cli/summarypages.py", line 208, in main
    args = func["input"](opts)
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/gw/inputs.py", line 765, in __init__
    "no_conversion"
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/core/inputs.py", line 1469, in __init__
    self.samples = self.opts.samples
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/core/inputs.py", line 537, in samples
    self._set_samples(samples)
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/gw/inputs.py", line 154, in _set_samples
    super(_GWInput, self)._set_samples(*args, **kwargs)
  File "/home/richard.udall/pesummary/lib/python3.7/site-packages/pesummary-0.5.3-py3.7.egg/pesummary/core/inputs.py", line 644, in _set_samples
    "{}/{}".format(key, label), pp[key][label]
KeyError: 'SEOBNRv4PHM_guided_ie'.

Is there some change in usage I need to make (the same script works correctly when run in a release environment)?