X-Payments: error

Error #1 PHP_EXCEPTION. Class: XPay\Exception\Main

Internal PHP exception: "XPay\Core\Session::getSessionId(): Return value must be of type string, null returned"

/var/www/html/cloud/classes/XPay/Core/Session.php:189
/var/www/html/cloud/classes/XPay/Core/TopMessage.php:55
/var/www/html/cloud/classes/XPay/Core/TopMessage.php:81
/var/www/html/cloud/classes/XPay/View/Admin.php:369
/var/www/html/cloud/classes/XPay/Skin/Admin/Home.php:14
/var/www/html/cloud/classes/XPay/Core/View.php:82
/var/www/html/cloud/classes/XPay/Core/View.php:198
/var/www/html/cloud/classes/XPay/View/Admin.php:301
/var/www/html/cloud/classes/XPay/Core/Dispatcher.php:175
/var/www/html/cloud/classes/XPay/Application.php:183
/var/www/html/cloud/admin.php:18

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