ODK Aggregate v2 and greater does not support App Engine. We put this in the documentation at https://docs.opendatakit.org/aggregate-app-engine-legacy and you can find out the reasoning at Upcoming changes to Aggregate.
ODK Aggregate v2 and greater does not support App Engine. We put this in the documentation at https://docs.opendatakit.org/aggregate-app-engine-legacy and you can find out the reasoning at Upcoming changes to Aggregate.