When we are downloading the BW datasets some datasets throw the error message:
"JSONArray not a string"
You are getting this lumira error because the selection variable in the BEX query was defined as interval; starting month / ending month.
If only the first value (starting month) is provided, Lumira will throw the error.
To resolve the error please do as following:
You should set the same value for the starting month and ending month. keep in mind that this also applies to variables defined as Optional.