unable to import large .grmt file

I created a 35.5 MB .grmt file via 'export all recipes' in my Gourmet installation on my Windows 10 system. When I try to import that file into Gourmet on my Raspberry Pi 4 system, I get the following traceback:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gourmet/threadManager.py", line 97, in run
    self.do_run()
  File "/usr/lib/python2.7/dist-packages/gourmet/importers/xml_importer.py", line 70, in do_run
    self.parse = xml.sax.parse(self.fn, self.rh)
  File "/usr/lib/python2.7/xml/sax/__init__.py", line 33, in parse
    parser.parse(source)
  File "/usr/lib/python2.7/xml/sax/expatreader.py", line 111, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.7/xml/sax/expatreader.py", line 224, in feed
    self._err_handler.fatalError(exc)
  File "/usr/lib/python2.7/xml/sax/handler.py", line 38, in fatalError
    raise exception
SAXParseException: /home/pi/tmp/recipes.grmt:6:3: not well-formed (invalid token)

I am able to export/import individual recipes and small collections of recipes, but not my entire database.