Fatal error: Uncaught exception 'Ip\Exception' with message 'Please install User plugin' in /home/katstoolbox/public_html/Plugin/SimpleProduct/SiteController.php:31 Stack trace: #0 [internal function]: Plugin\SimpleProduct\SiteController->checkout('22') #1 /home/katstoolbox/public_html/Ip/Internal/Core/Job.php(130): call_user_func_array(Array, Array) #2 [internal function]: Ip\Internal\Core\Job::ipExecuteController_70(Array) #3 /home/katstoolbox/public_html/Ip/Internal/Dispatcher/JobDispatcher.php(39): call_user_func('\\Ip\\Internal\\Co...', Array) #4 /home/katstoolbox/public_html/Ip/Dispatcher.php(101): Ip\Internal\Dispatcher\JobDispatcher->handle('ipExecuteContro...', Array) #5 /home/katstoolbox/public_html/Ip/Functions.php(369): Ip\Dispatcher->job('ipExecuteContro...', Array) #6 /home/katstoolbox/public_html/Ip/Application.php(286): ipJob('ipExecuteContro...', Array) #7 /home/katstoolbox/public_html/Ip/Application.php(304): Ip\Application->_handleOnlyRequest(Object(Ip\Request), Array, false) #8 /home/katstoolbox/public in /home/katstoolbox/public_html/Plugin/SimpleProduct/SiteController.php on line 31