Getting error Length of the data to decrypt is invalid

Question

internal string DecryptData(string iEncryptedText, string aesKey, string iv, int iKeySize = 128)
    {
        PasswordDeriveBytes pdb = new PasswordDeriveBytes(iv, new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F });
        PasswordDeriveBytes pdb2 = new PasswordDeriveBytes(aesKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        RijndaelManaged aesEncryption = new RijndaelManaged();
        aesEncryption.KeySize = iKeySize;
        aesEncryption.BlockSize = 128;
        aesEncryption.Mode = CipherMode.CBC;
        aesEncryption.Padding = PaddingMode.Zeros;
        aesEncryption.IV = pdb.GetBytes(16);
        aesEncryption.Key = pdb2.GetBytes(16); ;
        ICryptoTransform decrypto = aesEncryption.CreateDecryptor();
        byte[] encryptedBytes = Convert.FromBase64CharArray(iEncryptedText.Replace(" ", "+").ToCharArray(), 0, iEncryptedText.Length);
        return Encoding.UTF8.GetString(decrypto.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length));


    }