Can't decrypt iOS encrypte data in base64 format

[yasirIqbal11]

I am using BlueEcc for prime256v1 ecnryption and both in iOS and on Node.js server!
I encrypt data in iOS and pass it to Node.js server in base64 form. I am passing both base64 encrypted data and buffer data but receive error.
It doesn't decrypt data COMING FROM IOS SIDE, same for the other way.

I receive the following error!

nternal/crypto/cipher.js:172
const ret = this[kHandle].final();
^

Error: Unsupported state or unable to authenticate data
at Decipheriv.final (internal/crypto/cipher.js:172:29)
at Object.module.exports.decrypt (/Users/yasiriqbal/Desktop/encryption/index.js:114:62)
at Object. (/Users/yasiriqbal/Desktop/encryption/app.js:21:19)
at Module._compile (internal/modules/cjs/loader.js:1133:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
at Module.load (internal/modules/cjs/loader.js:977:32)
at Function.Module._load (internal/modules/cjs/loader.js:877:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
at internal/main/run_main_module.js:18:47

This is my server code!

const ecc = require('./index');
const ECKey = require("ec-key");

let privateKeyString = "-----BEGIN EC PRIVATE KEY-----\nMHcCAQEEILaJOS3gzq30ub5QL0R3RSDCAeds+HHXNwbtpeJbGPR9oAoGCCqGSM49\nAwEHoUQDQgAEBAGv/eKV+rRnPJEmdT7PIE3iTGityqzxn8lCqVQ+reVLtrc+3c0Q\n0eSP7V19XtDgnjYzzX48T39u64QZ8gpt9A==\n-----END EC PRIVATE KEY-----"
let privateKeyBuffer = Buffer.from( ecc.extractKeyData(privateKeyString, "pem", false), 'base64');

let publicKeyString = "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEBAGv/eKV+rRnPJEmdT7PIE3iTGit\nyqzxn8lCqVQ+reVLtrc+3c0Q0eSP7V19XtDgnjYzzX48T39u64QZ8gpt9A==\n-----END PUBLIC KEY-----"
let publicKey = Buffer.from( ecc.extractKeyData(publicKeyString, "pem", false), 'base64');

/*
let input = "yasir iqbal"
let encData = ecc.encrypt(publicKey, input);
*/

let encData = "BFU+yKJUjrb9qXdp2jsj+RDqBZbehyBmieX8M4imHWcxy0FvtaynTWRJy8ijAKBMHZCwcbYyt6UsrwLfFXkSG8W+oVI9k6G9zE/6bu0n5Ezif/gs6UIiG39Vq3M="
let base8Buffer = Buffer.from(encData, "base64");

console.log("Enc Data: ", encData);

let decData = ecc.decrypt(privateKeyBuffer, base8Buffer);
console.log("Decrypt Data: ", decData);

Your help would be appreciated! Thanks.