Error when login with Mobile App (no replies)

Here is message that I received trying to login with mobile app. It comes after updating to version 2.8.3.

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There is an error. Please report the message (Piwik 2.8.3) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Notice: Undefined property: stdClass::$module in /var/www/analytics/plugins/Dashboard/API.php on line 137

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/var/www/analytics/plugins/Dashboard/API.php:137]
#1 Piwik\Plugins\Dashboard\API->widgetExists(...) called at [/var/www/analytics/plugins/Dashboard/API.php:94]
#2 Piwik\Plugins\Dashboard\API->getExistingWidgetsWithinDashboard(...) called at [/var/www/analytics/plugins/Dashboard/API.php:76]
#3 Piwik\Plugins\Dashboard\API->getUserDashboards(...) called at [/var/www/analytics/plugins/Dashboard/API.php:35]
#4 Piwik\Plugins\Dashboard\API->getDashboards(...) called at [:]
#5 call_user_func_array(...) called at [/var/www/analytics/core/API/Proxy.php:211]
#6 Piwik\API\Proxy->call(...) called at [/var/www/analytics/core/API/Request.php:216]
#7 Piwik\API\Request->process(...) called at [/var/www/analytics/plugins/API/API.php:513]
#8 Piwik\Plugins\API\API->getBulkRequest(...) called at [:]
#9 call_user_func_array(...) called at [/var/www/analytics/core/API/Proxy.php:211]
#10 Piwik\API\Proxy->call(...) called at [/var/www/analytics/core/API/Request.php:216]
#11 Piwik\API\Request->process(...) called at [/var/www/analytics/plugins/API/Controller.php:33]
#12 Piwik\Plugins\API\Controller->index(...) called at [:]
#13 call_user_func_array(...) called at [/var/www/analytics/core/FrontController.php:587]
#14 Piwik\FrontController->doDispatch(...) called at [/var/www/analytics/core/FrontController.php:95]
#15 Piwik\FrontController->dispatch(...) called at [/var/www/analytics/core/dispatch.php:34]
#16 require_once(...) called at [/var/www/analytics/index.php:46]