Bug importing an Eagle 5 design

Here is the stack trace,

Unexpected import error. | Traceback (most recent call last):
File “/home/ubuntu/builds/20170914152843/eggs/background_workers-201709105038_243ce191-py2.7.egg/background_workers/handlers/import_file.py”, line 330, in work
File “/usr/lib/python2.7/dist-packages/upconvert/upconverter.py”, line 142, in file_to_upv
design = Upconverter.parse(tmp_path, frmt)
File “/usr/lib/python2.7/dist-packages/upconvert/upconverter.py”, line 84, in parse
return par_inst.parse(in_filename)
File “/usr/lib/python2.7/dist-packages/upconvert/parser/eagle.py”, line 2787, in parse
design = self._convert()
File “/usr/lib/python2.7/dist-packages/upconvert/parser/eagle.py”, line 2544, in _convert
_ci = ComponentInstance(instance_id=_pp.name,
NameError: global name ‘ComponentInstance’ is not defined