After uploading Shoppica as per directions onto a new install of OC 3.1b , it returns an error whenever trying to access via extension/theme.

OC returns no errors on the default theme.

Fatal error: ‘Cannot pass parameter 2 by reference’
in /home/watermou/public_html/system/vendor/BurnEngine/library/Extension.php:338
Stack trace:
#0 system/vendor/BurnEngine/library/Controller.php(141): TB_Extension->loadController(‘common/header’)
#1 system/vendor/BurnEngine/admin/controller/DefaultController.php(134): TB_Controller->renderTemplate(‘theme’)
#2 system/vendor/BurnEngine/library/AdminDispatcher.php(95): Theme_Admin_DefaultController->index()
#3 system/vendor/BurnEngine/admin/controller/ModuleController.php(78): TB_AdminDispatcher->dispatch(‘BurnEngine’, ‘default’, ‘index’)
#4 system/engine/action.php(79): Theme_Admin_ModuleController->index()
#5 admin/controller/startup/router.php(26): Action->execute(Object(Registry), Array)
#6 system/engine/action.php(79): ControllerStartupRouter->index()
#7 system/engine/router.php(67): Action->execute(Object(Registry))
#8 system/engine/router.php(56): Router->execute(Object(Action))
#9 system/framework.php(185): Router->dispatch(Object(Action), Object(Action))
#10 system/startup.php(104): require_once(‘/home/watermou/…’)
#11 admin/index.php(19): start(‘admin’)
#12 {main}

Please advise.