I am trying to encrypt string on golang server, i have a aes-128 encrypt util

func EncryptAES(key []byte, plaintext string) (string, error) {
    // create cipher
    c, err := aes.NewCipher(key)
    if err != nil {
        return "", err
    }

    // allocate space for ciphered data
    out := make([]byte, len(plaintext))

    for i := 1; i <= len(plaintext)/16; i++ {
        tempBuf := make([]byte, 16)

        offset := (i - 1) * 16
        limit := offset + 16
        // encrypt
        c.Encrypt(tempBuf, []byte(plaintext[offset:limit]))

        for j := 0; j < len(tempBuf); j++ {
            out[offset+j] = tempBuf[j]
        }
    }
    // return hex string
    return hex.EncodeToString(out), nil
}

and after that i am trying to do something like that

    hasher := sha256.New()
    hasher.Write([]byte(word))
    sha := hasher.Sum(nil)

    cypherText := word + userSessionKey

    for len([]byte(cypherText))%16 != 0 {
        cypherText += "0"
    }

    sha128 := sha[:len(sha)/2]

    captchaKey, err := utils.EncryptAES([]byte(hex.EncodeToString(sha128)), cypherText)
    if err != nil {
        SendErrorResponse(ctx, fasthttp.StatusInternalServerError, []byte("error generating aes session key "+err.Error()))
        return
    }

but for this key and ciphertext i am getting this error on encryption/decryption aes site

js func for decoding not working too

async function decryptAES128(key, cipherText){
    let hash = CryptoJS.SHA256(key).toString();
    hash = hash.substring(0, hash.length/2);

    console.log(hash);
    console.log(cipherText)

    const bytes = await CryptoJS.AES.decrypt(CryptoJS.enc.Hex.parse(cipherText), CryptoJS.enc.Hex.parse(hash), { mode: CryptoJS.mode.ECB });

    return CryptoJS.enc.Utf8.stringify(bytes.words)
}

just prints nothing