[LIST]
[*]
[*]InvalidArgumentException: XenForo upgrade check failed: Unexpected result, starting '<html> <head><title>403 Forbidden</title></head> <body bgcolor="white"> <center><h1>403 Forbidden' // json_decode error: Syntax error
[*]
[*]src/vendor/guzzlehttp/guzzle/src/functions.php:304
[*]
[/LIST]
#0 src/XF/Service/Upgrade/Checker.php(81): GuzzleHttp\json_decode()
#1 src/XF/Admin/Controller/Tools.php(408): XF\Service\Upgrade\Checker->check()
#2 src/XF/Mvc/Dispatcher.php(350): XF\Admin\Controller\Tools->actionUpgradeCheck()
#3 src/XF/Mvc/Dispatcher.php(257): XF\Mvc\Dispatcher->dispatchClass()
#4 src/XF/Mvc/Dispatcher.php(113): XF\Mvc\Dispatcher->dispatchFromMatch()
#5 src/XF/Mvc/Dispatcher.php(55): XF\Mvc\Dispatcher->dispatchLoop()
#6 src/XF/App.php(2184): XF\Mvc\Dispatcher->run()
#7 src/XF.php(391): XF\App->run()
#8 admin.php(13): XF::runApp()
#9 {main}