Mongo query: "Schema change not currently supported for schemas with complex types"

I'm attempting to run this mongo query that ran successfully in Drill 1.19 with the 1.21.0-SNAPSHOT build. 
 
SELECT `Elements_Efforts`.`EffortTypeName` AS `EffortTypeName`,
  `Elements`.`ElementSubTypeName` AS `ElementSubTypeName`,
  `Elements`.`ElementTypeName` AS `ElementTypeName`,
  `Elements`.`PlanID` AS `PlanID`
FROM `mongo.grounds`.`Elements` `Elements`
  INNER JOIN `mongo.grounds`.`Elements_Efforts` `Elements_Efforts` ON (`Elements`.`_id` = `Elements_Efforts`.`_id`)
WHERE (`Elements`.`PlanID` = '1623263140')
GROUP BY `Elements_Efforts`.`EffortTypeName`,
  `Elements`.`ElementSubTypeName`,
  `Elements`.`ElementTypeName`,
  `Elements`.`PlanID`
 
I'm getting this error message: UserRemoteException : SYSTEM ERROR: RuntimeException: Schema change not currently supported for schemas with complex types. I've attached the log, profile, and a mongodb dump containing the relevant datasets.