length of the data to decrypt is invalid

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C#

Everytime i debuc i always get this message "length of the data to decrypt is invalid"

here is the PasswordEncryption class

 public class PasswordEncryption
    {

         string passPhrass = "";
         public PasswordEncryption()
        {
            passPhrass = "P333awss";
        }
        private byte[] Encrypt(byte[] clearData, byte[] Key, byte[] IV)
        {
            MemoryStream ms = new MemoryStream();

            Rijndael algorithm = Rijndael.Create();

            algorithm.Key = Key;
            algorithm.IV = IV;

            CryptoStream cs = new CryptoStream(ms, algorithm.CreateEncryptor(), CryptoStreamMode.Write);
            cs.Write(clearData, 0, clearData.Length);
            cs.Close();

            byte[] encrytedData = ms.ToArray();

            return encrytedData;
        }
        public string Encrypt(string password)
        {
            byte[] clearBytes = Encoding.Unicode.GetBytes(password);
            byte[] saltBytes = 
                {
                    0x49, 
                    0x76,
                    0x61, 
                    0x6e, 
                    0x20, 
                    0x4d, 
                    0x65, 
                    0x64, 
                    0x76, 
                    0x65, 
                    0x64, 
                    0x65, 
                    0x76
                };

            PasswordDeriveBytes passwordDeriveBytes = new PasswordDeriveBytes(passPhrass, saltBytes);

            byte[] encryptedData = Encrypt(clearBytes, passwordDeriveBytes.GetBytes(32), passwordDeriveBytes.GetBytes(16));

            return Convert.ToBase64String(encryptedData);
        }
        private byte[] Decrypt(byte[] cipherData, byte[] Key, byte[] IV)
        {
            MemoryStream memoryStream = new MemoryStream();

            Rijndael algorithm = Rijndael.Create();

            algorithm.Key = Key;
            algorithm.IV = IV;

            CryptoStream cryptoStream = new CryptoStream(memoryStream, algorithm.CreateDecryptor(), CryptoStreamMode.Write);

            cryptoStream.Write(cipherData, 0, cipherData.Length);
            cryptoStream.Close();

            byte[] decryptedData = memoryStream.ToArray();

            return decryptedData;
        }
        public string Decrypt(string password)
        {
            byte[] passwordBytes = Convert.FromBase64String(password);

            byte[] saltBytes = 
                            {
                                0x49, 
                                0x76,
                                0x61, 
                                0x6e, 
                                0x20, 
                                0x4d, 
                                0x65, 
                                0x64, 
                                0x76, 
                                0x65, 
                                0x64, 
                                0x65, 
                                0x76
                            };

            PasswordDeriveBytes passwordDeriveBytes = new PasswordDeriveBytes(passPhrass, saltBytes);

            byte[] decryptedData = Decrypt(passwordBytes, passwordDeriveBytes.GetBytes(32), passwordDeriveBytes.GetBytes(16));
           
            return Encoding.Unicode.GetString(decryptedData);
            
        }
}