MongoError: can't convert from BSON type string to Date

help
1

I have this piece of code that runs fine on my computer but it fails in production :

let today = new Date()
let users = Meteor.users.find({
	"status.lastLogin": { $not: { $eq: null } },
	$expr: {
		$and: [
			{
				$eq: [
					{
						$dayOfMonth: {
							date: "$profile.birthdate",
							timezone: "Europe/Paris",
						},
					},
					today.getDate(),
				],
			},
			{
				$eq: [
					{
						$month: {
							date: "$profile.birthdate",
							timezone: "Europe/Paris",
						},
					},
					today.getMonth() + 1,
				],
			},
		],
	},
})

My server is hosted on Galaxy and the DB on mongodb.com
I checked the profile.birthdate type and it is Date on mongodb.com

Screen Shot 2020-05-25 at 5.41.16 PM
Screen Shot 2020-05-25 at 5.41.16 PM1132×44 8.33 KB

The error is :
MongoError: can’t convert from BSON type string to Date\n at Connection. (/app/bundle/programs/server/npm/node_modules/meteor/npm-mongo/node_modules/mongodb/lib/core/connection/pool.js:450:61)\n at Connection.emit (events.js:311:20)\n at Connection.EventEmitter.emit (domain.js:482:12)\n at processMessage (/app/bundle/programs/server/npm/node_modules/meteor/npm-mongo/node_modules/mongodb/lib/core/connection/connection.js:384:10)\n at TLSSocket.

Does anyone know why this is happening and how can I fix it?