Not a Bug ErrorException: Template error: [E_USER_WARNING]

Hy,
i'm not sure, witch addon creates this error, i hope, you can have a look over this error message:

Code:

ErrorException: Template error: [E_USER_WARNING] Method canViewShowcaseItems is not callable on the given object (Siropu\KeywordLinking\XF\Entity\User) src/XF/Template/Templater.php:1161

Code:

Stack-Trace
#0 [internal function]: XF\Template\Templater->handleTemplateError(512, '[E_USER_WARNING...', '/home/www/doc/2...', 1161, Array)
#1 src/XF/Template/Templater.php(1161): trigger_error('Method canViewS...', 512)
#2 internal_data/code_cache/templates/l3/s3/public/member_list_macros.php(45): XF\Template\Templater->method(Object(Siropu\KeywordLinking\XF\Entity\User), 'canViewShowcase...', Array)
#3 src/XF/Template/Templater.php(799): XF\Template\Templater->{closure}(Object(XF\Template\Templater), Array, NULL)
#4 internal_data/code_cache/templates/l3/s3/public/reaction_list.php(34): XF\Template\Templater->callMacro('member_list_mac...', 'item', Array, Array)
#5 src/XF/Template/Templater.php(799): XF\Template\Templater->{closure}(Object(XF\Template\Templater), Array, NULL)
#6 internal_data/code_cache/templates/l3/s3/public/reaction_list.php(142): XF\Template\Templater->callMacro('reaction_list', 'reactions_list', Array, Array)
#7 src/XF/Template/Templater.php(1626): XF\Template\Templater->{closure}(Object(XF\Template\Templater), Array, NULL)
#8 src/XF/Template/Template.php(24): XF\Template\Templater->renderTemplate('reaction_list', Array)
#9 src/XF/Mvc/Renderer/Html.php(48): XF\Template\Template->render()
#10 src/XF/Mvc/Dispatcher.php(458): XF\Mvc\Renderer\Html->renderView('XF:Reaction\\Lis...', 'public:reaction...', Array)
#11 src/XF/Mvc/Dispatcher.php(440): XF\Mvc\Dispatcher->renderView(Object(XF\Mvc\Renderer\Html), Object(XF\Mvc\Reply\View))
#12 src/XF/Mvc/Dispatcher.php(400): XF\Mvc\Dispatcher->renderReply(Object(XF\Mvc\Renderer\Html), Object(XF\Mvc\Reply\View))
#13 src/XF/Mvc/Dispatcher.php(58): XF\Mvc\Dispatcher->render(Object(XF\Mvc\Reply\View), 'html')
#14 src/XF/App.php(2300): XF\Mvc\Dispatcher->run()
#15 src/XF.php(488): XF\App->run()
#16 index.php(20): XF::runApp('XF\\Pub\\App')
#17 {main}

Code:

array(4) {
  ["url"] => string(37) "/index.php?posts%2F369831%2Freactions"
  ["referrer"] => bool(false)
  ["_GET"] => array(1) {
   ["posts/369831/reactions"] => string(0) ""
  }
  ["_POST"] => array(0) {
  }
}

kr Chris

 

Thank you for your fast answaer.
At the moment it just happend onetime