Template evaluation fails - cannot find 'format'

[cngarrison]

Where should I look to fix the following error? Maybe it's due to a missing python package?

Sep 23 17:40:30 lanserver weewx[9623] ERROR weewx.cheetahgenerator: Evaluation of template /etc/weewx/skins/neowx-material/archive/NOAA-%Y-%m.txt.tmpl failed.
Sep 23 17:40:30 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** Ignoring template /etc/weewx/skins/neowx-material/archive/NOAA-%Y-%m.txt.tmpl
Sep 23 17:40:30 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** Reason: cannot find 'format' while searching for 'format'
Sep 23 17:40:30 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** To debug, try inserting '#errorCatcher Echo' at top of template
Sep 23 17:40:47 lanserver weewx[9623] ERROR weewx.cheetahgenerator: Evaluation of template /etc/weewx/skins/neowx-material/archive/NOAA-%Y.txt.tmpl failed.
Sep 23 17:40:47 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** Ignoring template /etc/weewx/skins/neowx-material/archive/NOAA-%Y.txt.tmpl
Sep 23 17:40:47 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** Reason: cannot find 'nolabel' while searching for 'nolabel'
Sep 23 17:40:47 lanserver weewx[9623] ERROR weewx.cheetahgenerator: **** To debug, try inserting '#errorCatcher Echo' at top of template
Sep 23 17:41:24 lanserver weewx[9623] INFO weewx.cheetahgenerator: Generated 10 files for report NeoWXReport in 55.58 seconds
Sep 23 17:41:24 lanserver weewx[9623] INFO weewx.reportengine: Copied 0 files to /var/www/html/weewx/neowx-material

-cng