Error in pager app

[mhearne-usgs]

pager -d ~/us70005axg_error.grid.xml
INFO -- 2019-09-09 09:09:39 -- pager.main -- Creating event directory
INFO -- 2019-09-09 09:09:39 -- pager.main -- Population year: 2018 Population file: /Users/user/losspager/model_data/lspop2018.flt

INFO -- 2019-09-09 09:09:39 -- pager.main -- Calculating population exposure.
CRITICAL -- 2019-09-09 09:09:39 -- pager.main -- 'NoneType' object has no attribute 'getValue'
Traceback (most recent call last):
File "/Users/user/src/python/losspager/bin/pager", line 428, in main
numcode = expomodel._isogrid.getValue(elat, elon)
AttributeError: 'NoneType' object has no attribute 'getValue'

Error on file: /Users/user/us70005axg_error.grid.xml

Error on event: us70005axg

Error on version: 2

INFO -- 2019-09-09 09:09:39 -- pager.main -- Sent error to email
grid.zip