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Unable to download collector map for offline use - "Parameters cannot be null"

Question asked by ShaneKrupinski on Jul 6, 2019
Latest reply on Aug 9, 2019 by miaogeng_zhang-esristaff

Hey there - new to collector and webmaps in general. Currently attempting to download a collector map for offline use and failing. I have gone over all my layers and have edited any custom fields to allow null values to no avail. I have roughly 10 empty hosted feature layers and a vektor tile basemap. Just curious if this is a common problem or if there is something I'm missing. If any more info is needed just ask. Currently on Samsung Galaxy Tab Active 2 android version 8.1.0


Thanks a  bunch


EDIT: Changed basemap to a tpk and am now recieving error message: attempt to invoke virtual method 'java.lang.string java.lang.string.toLowerCase(java.util.Locale)' on a null object reference