bootstrapCrossSigning() failing with "Error: the signing key is missing from the object that signed the message"

[Crazypersonalph]

Good afternoon,
I am writing a simple program to send encrypted messages to a matrix room.
I am currently trying to setup cross-signing, but am erroring out with

import * as sdk from "matrix-js-sdk";
import "fake-indexeddb/auto";
import bs58 from "bs58";


const recoveryKeyString = process.env.BACKUP_KEY_MATRIX

const client = sdk.createClient({ 
 baseUrl: "https://matrix.org", 
 accessToken: process.env.MATRIX_ACCESS_TOKEN, 
 userId: process.env.MATRIX_USER,
 deviceId: "frigate-server",
 cryptoCallbacks: {
    getSecretStorageKey: async (keys) => {
        const key = sdk.Crypto.decodeRecoveryKey(recoveryKeyString);
        return [Object.keys(keys.keys)[0], key];
    },
},
});

await client.initRustCrypto();
client.getCrypto().bootstrapSecretStorage({
    // This function will be called if a new secret storage key (aka recovery key) is needed.
    // You should prompt the user to save the key somewhere, because they will need it to unlock secret storage in future.
    createSecretStorageKey: async () => {
        return key;
    }
    
});

await client.getCrypto().bootstrapCrossSigning({
    authUploadDeviceSigningKeys: async (makeRequest) => {
        return makeRequest(authDict);
    },
});

client.startClient({ initialSyncLimit: 10});

const content = {
    body: "message text",
    msgtype: "m.text",
};

client.getCrypto().prepareToEncrypt(process.env.MATRIX_ROOM_ID);

await client.sendEvent(process.env.MATRIX_ROOM_ID, "m.room.message", content, "", (err, res) => {
    console.log(err);
});

All messages sent to the room aren't encrypted either.
The account was originally setup with Element, in which secure backup, encryption, and cross-signing were also setup.
All values provided in process.env are correct.

It is erroring out with:

bootstrapCrossSigning: starting {
  setupNewCrossSigning: undefined,
  olmDeviceHasMaster: false,
  olmDeviceHasUserSigning: false,
  olmDeviceHasSelfSigning: false,
  privateKeysInSecretStorage: true
}
bootstrapCrossSigning: Cross-signing private keys not found locally, but they are available in secret storage, reading storage and caching locally
WARN matrix_sdk_crypto::store: No public identity found while importing cross-signing keys, a /keys/query needs to be done

Error: the signing key is missing from the object that signed the message

Does anybody have any input?

Kind Regards

[Crazypersonalph]

Also noticed this in the logs, not sure if it's related.
Key backup present on server but not trusted: not enabling key backup