MongoDB connecting on localhost but not on Render app

I'm creating a forum for my physics engine website so that people can share their saves with everyone. It works on localhost with MongoDB, but when I upload it to Render, I get an error that says,

MongoServerSelectionError: C09C71AF47700000:error:0A000438:SSL

and the website says, "Cannot GET /". Here is the full error message:

MongoServerSelectionError: C09C71AF47700000:error:0A000438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error:../deps/openssl/openssl/ssl/record/rec_layer_s3.c:1605:SSL alert number 80
    at Topology.selectServer (/opt/render/project/src/node_modules/mongodb/lib/sdam/topology.js:321:38)
    at async Topology._connect (/opt/render/project/src/node_modules/mongodb/lib/sdam/topology.js:200:28)
    at async Topology.connect (/opt/render/project/src/node_modules/mongodb/lib/sdam/topology.js:152:13)
    at async topologyConnect (/opt/render/project/src/node_modules/mongodb/lib/mongo_client.js:233:17)
    at async MongoClient._connect (/opt/render/project/src/node_modules/mongodb/lib/mongo_client.js:246:13) {
  errorLabelSet: Set(0) {},
  reason: TopologyDescription {
    type: 'ReplicaSetNoPrimary',
    servers: Map(3) {
      'boxsandcluster-shard-00-01.uumcy.mongodb.net:27017' => [ServerDescription],
      'boxsandcluster-shard-00-02.uumcy.mongodb.net:27017' => [ServerDescription],
      'boxsandcluster-shard-00-00.uumcy.mongodb.net:27017' => [ServerDescription]
    },
    stale: false,
    compatible: true,
    heartbeatFrequencyMS: 10000,
    localThresholdMS: 15,
    setName: 'atlas-zq9ej0-shard-0',
    maxElectionId: null,
    maxSetVersion: null,
    commonWireVersion: 0,
    logicalSessionTimeoutMinutes: null
  },
  code: undefined,

The routes not requiring MongoDB work, but any connecting to MongoDB doesn't work and results in an error.

How can I fix this?

MongoDB version is 6.15.0.