I don't know why this error is comming. It was working fine in PHP 7.3 version. But when I update my PHP version to 8.1.5 then it's giving me this error. Any solution?
A PHP Error was encountered
Severity: 8192
Message: Return type of Symfony\Component\HttpFoundation\ParameterBag::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: http-foundation/ParameterBag.php
Line Number: 220
Backtrace:
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\symfony\http-foundation\ParameterBag.php
Line: 19
Function: _error_handler
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\composer\ClassLoader.php
Line: 571
Function: include
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\composer\ClassLoader.php
Line: 428
Function: Composer\Autoload\includeFile
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\symfony\http-foundation\Request.php
Line: 273
Function: loadClass
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\symfony\http-foundation\Request.php
Line: 255
Function: initialize
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\symfony\http-foundation\Request.php
Line: 2095
Function: __construct
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\symfony\http-foundation\Request.php
Line: 314
Function: createRequestFromFactory
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\vendor\ngekoding\codeigniter-datatables\src\DataTables.php
Line: 41
Function: createFromGlobals
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\application\controllers\user\Devices.php
Line: 41
Function: __construct
File: C:\xampp\htdocs\projects\codeigniter\fastpay-payment-gateway\fastpay\index.php
Line: 315
Function: require_once