Not a Bug Error messsages

I have installed pickem but not set anything up yet. I received a message on install:

Code:

src/addons/XenAddons/Pickem/XF/Pub/Controller/GotoPage.php Unexpected contents 

And also have the following server error messages.

Code:

Server error log

    Exception: Could not find class XenAddons\Pickem\XF\Pub\Controller\GotoPage when attempting to extend XF\Pub\Controller\GotoPage src/XF/Extension.php:174

    Generated by: Unknown account Jul 31, 2018 at 1:58 PM

Stack trace

#0 src/XF/App.php(2406): XF\Extension->extendClass('XF\\Pub\\Controll...', NULL)
#1 src/XF/App.php(1275): XF\App->extendClass('XF\\Pub\\Controll...')
#2 src/XF/Container.php(228): XF\App->XF\{closure}('XF\\Pub\\Controll...', Array, Object(XF\Container))
#3 src/XF/App.php(2361): XF\Container->create('controller', 'XF:GotoPage', Array)
#4 src/XF/Mvc/Dispatcher.php(211): XF\App->controller('XF:GotoPage', Object(XF\Http\Request))
#5 src/XF/Mvc/Dispatcher.php(88): XF\Mvc\Dispatcher->dispatchClass('XF:GotoPage', 'post', 'html', Object(XF\Mvc\ParameterBag), '', NULL, NULL)
#6 src/XF/Mvc/Dispatcher.php(41): XF\Mvc\Dispatcher->dispatchLoop(Object(XF\Mvc\RouteMatch))
#7 src/XF/App.php(1931): XF\Mvc\Dispatcher->run()
#8 src/XF.php(328): XF\App->run()
#9 index.php(13): XF::runApp('XF\\Pub\\App')
#10 {main}

Request state

array(4) {
  ["url"] => string(40) "/community/index.php?goto/post&id=109284"
  ["referrer"] => bool(false)
  ["_GET"] => array(2) {
    ["goto/post"] => string(0) ""
    ["id"] => string(6) "109284"
  }
  ["_POST"] => array(0) {
  }

Hope that makes sense.

 

Thanks @Bob all sorted.