MijoAnalytics - Error after installation! (no replies)

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!).

Strict Notice: Only variables should be assigned by reference in /home/isarab2014/public_html/plugins/system/social_presence/social_presence.php on line 41

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/home/isarab2014/public_html/plugins/system/social_presence/social_presence.php:41]
#1 plgSystemSocial_presence->onAfterRender(...) called at [:]
#2 call_user_func_array(...) called at [/home/isarab2014/public_html/libraries/joomla/event/event.php:71]
#3 JEvent->update(...) called at [/home/isarab2014/public_html/libraries/joomla/event/dispatcher.php:162]
#4 JEventDispatcher->trigger(...) called at [/home/isarab2014/public_html/libraries/joomla/application/base.php:106]
#5 JApplicationBase->triggerEvent(...) called at [/home/isarab2014/public_html/libraries/cms/application/cms.php:994]
#6 JApplicationCms->render(...) called at [/home/isarab2014/public_html/libraries/cms/application/administrator.php:436]
#7 JApplicationAdministrator->render(...) called at [/home/isarab2014/public_html/libraries/cms/application/cms.php:257]
#8 JApplicationCms->execute(...) called at [/home/isarab2014/public_html/administrator/index.php:42]