Error: The payload is invalid

I am using backpack 3.4 and laravel 5.6 . I have one register API where i am using AES encrypt to encrypt the "name" of the user . Now, when i am retriving that value in backpack view, its coming as an ajaxlist with the same encrypted name . So, i built one accessor "getNameAttribute($value)" where i used decrypt to decrypt the name . But there is one error called "The payload is invalid". Someone tell me how to solve this.

$user = User::create([
                  'deviceType' => request('deviceType'),
                  'appVersion' => request('appVersion'),
                  'osVersion' => request('osVersion'),
			            'email' 				=> request('email'),
			            'password' 				=> Hash::make($password),
			            'name' 					=> encrypt(request('name')),
			            'facebook_id' 			=> request('facebookID'),
			            'register_type' 		=> $register_type,
			            'activation_status' 	=> $activation_status
			        ]);

And in the user model,

public function getNameAttribute($value)
    {
        
        $name = decrypt($name1);
        return $name;
    }

And the error i am getting

C:\wamp64\www\Project_example\vendor\laravel\framework\src\Illuminate\Encryption\Encrypter.php
        return hash_hmac('sha256', $iv.$value, $this->key);
    }
 
    /**
     * Get the JSON array from the given payload.
     *
     * @param  string  $payload
     * @return array
     *
     * @throws \Illuminate\Contracts\Encryption\DecryptException
     */
    protected function getJsonPayload($payload)
    {
        $payload = json_decode(base64_decode($payload), true);
 
        // If the payload is not valid JSON or does not have the proper keys set we will
        // assume it is invalid and bail out of the routine since we will not be able
        // to decrypt the given value. We'll also check the MAC for this encryption.
        if (! $this->validPayload($payload)) {
            throw new DecryptException('The payload is invalid.');
        }
 
        if (! $this->validMac($payload)) {
            throw new DecryptException('The MAC is invalid.');
        }
 
        return $payload;
    }
 
    /**
     * Verify that the encryption payload is valid.
     *
     * @param  mixed  $payload
     * @return bool
     */
    protected function validPayload($payload)
    {
        return is_array($payload) && isset($payload['iv'], $payload['value'], $payload['mac']) &&
               strlen(base64_decode($payload['iv'], true)) === openssl_cipher_iv_length($this->cipher);
    }
Arguments
"The payload is invalid. (View: C:\wamp64\www\Project_example\vendor\backpack\base\src\resources\views\inc\sidebar_user_panel.blade.php) (View: C:\wamp64\www\Pro ▶"

it is throwing exception for this line :- if (! $this->validPayload($payload)) { throw new DecryptException('The payload is invalid.'); }

Can someone pls tell me how to solve this. I have followed such questions in other forums but unable to solve it . And also, pls explain or give a link for this question " What is payload ? "