API error on live server

I am getting an error using laravel api, the error only appears when I have uploaded my project on live server, but it is working on live server syntax error, unexpected 'Parser' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST)

API Controller

<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\User; 
// use Illuminate\Support\Facades\Auth; 
use Validator;
use Auth;

class UserController extends Controller
{
    public $successStatus = 200;
    /** 
     * login api 
     * 
     * @return \Illuminate\Http\Response 
     */ 
    public function login(){ 
        if(Auth::attempt(['email' => request('email'), 'password' => request('password')])){ 
            $user = Auth::user(); 
            $success['token'] =  $user->createToken('Laravel')-> accessToken; 
            return response()->json(['success' => $success], $this-> successStatus); 
        } 
        else{ 
            return response()->json(['error'=>'Unauthorised'], 401); 
        } 
    }

}

ParseError: syntax error, unexpected 'Parser' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in file /home/.../.../.../project/vendor/lcobucci/jwt/src/Configuration.php on line 22

<?php
declare(strict_types=1);

namespace Lcobucci\JWT;

use Closure;
use Lcobucci\JWT\Encoding\ChainedFormatter;
use Lcobucci\JWT\Encoding\JoseEncoder;
use Lcobucci\JWT\Signer\Key;
use Lcobucci\JWT\Signer\Key\InMemory;
use Lcobucci\JWT\Signer\None;
use Lcobucci\JWT\Validation\Constraint;

/**
 * Configuration container for the JWT Builder and Parser
 *
 * Serves like a small DI container to simplify the creation and usage
 * of the objects.
 */
final class Configuration
{
    private Parser $parser;  //line 22
    private Signer $signer;
    private Key $signingKey;
    private Key $verificationKey;
    private Validator $validator;

    /** @var Closure(ClaimsFormatter $claimFormatter): Builder */
    private Closure $builderFactory;

    /** @var Constraint[] */
    private array $validationConstraints = [];

    private function __construct(
        Signer $signer,
        Key $signingKey,
        Key $verificationKey,
        ?Encoder $encoder = null,
        ?Decoder $decoder = null
    ) {
        $this->signer          = $signer;
        $this->signingKey      = $signingKey;
        $this->verificationKey = $verificationKey;
        $this->parser          = new Token\Parser($decoder ?? new JoseEncoder());
        $this->validator       = new Validation\Validator();

        $this->builderFactory = static function (ClaimsFormatter $claimFormatter) use ($encoder): Builder {
            return new Token\Builder($encoder ?? new JoseEncoder(), $claimFormatter);
        };
    }

    public static function forAsymmetricSigner(
        Signer $signer,
        Key $signingKey,
        Key $verificationKey,
        ?Encoder $encoder = null,
        ?Decoder $decoder = null
    ): self {
        return new self(
            $signer,
            $signingKey,
            $verificationKey,
            $encoder,
            $decoder
        );
    }

    
}