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MongoDB Connection Error with Angular app

I got this error while running my angular app and I wasn't able to connect with database.

will share after I come up solution(s)

servers = [{

address = IP_ADDRESS_HERE,

type = UNKNOWN,

state = CONNECTING,

exception = {

com.mongodb.MongoSocketOpenException: Exception opening socket

},

caused by {

java.net.ConnectException: Connection refused(Connection refused)

}

}] 

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