Fatal error: During inheritance of JsonSerializable: Uncaught ErrorException: Return type of pk\Attosite\App\Config::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/home/ttpress6/domains/esendit.pl/core/App/Config.php:92
Stack trace:
#0 /usr/home/ttpress6/domains/esendit.pl/core/App/Config.php(6): pk\Attosite\App\App->pk\Attosite\App\{closure}(8192, 'Return type of ...', '/usr/home/ttpre...', 92)
#1 /usr/home/ttpress6/domains/esendit.pl/core/autoload.php(7): require('/usr/home/ttpre...')
#2 /usr/home/ttpress6/domains/esendit.pl/core/App/App.php(34): {closure}('pk\\Attosite\\App...')
#3 /usr/home/ttpress6/domains/esendit.pl/public_html/index.php(15): pk\Attosite\App\App->__construct()
#4 {main} in /usr/home/ttpress6/domains/esendit.pl/core/App/Config.php on line 6