It's showing an error when Youtube widget is assigned to profile sidebar. Currently on XenForo 2.0.12
#0 [internal function]: XF\Template\Templater->handleTemplateError(512, 'Template admin:...', '/home/forum...', 584, Array)
#1 src/XF/Template/Templater.php(584): trigger_error('Template admin:...', 512)
#2 src/XF/Template/Templater.php(539): XF\Template\Templater->getTemplateData('admin', 'widget_def_opti...')
#3 src/XF/Template/Templater.php(1249): XF\Template\Templater->getTemplateCode('admin', 'widget_def_opti...')
#4 src/XF/Widget/AbstractWidget.php(47): XF\Template\Templater->renderTemplate('widget_def_opti...', Array)
#5 src/XF/Entity/Widget.php(34): XF\Widget\AbstractWidget->renderOptions()
#6 [internal function]: XF\Entity\Widget->renderOptions()
#7 src/XF/Template/Templater.php(940): call_user_func_array(Array, Array)
#8 internal_data/code_cache/templates/l1/s0/admin/widget_edit.php(93): XF\Template\Templater->method(Object(XF\Entity\Widget), 'renderOptions', Array)
#9 src/XF/Template/Templater.php(1250): XF\Template\Templater->{closure}(Object(DohTheme\Core\XF\Template\Templater), Array)
#10 src/XF/Template/Template.php(24): XF\Template\Templater->renderTemplate('widget_edit', Array)
#11 src/XF/Mvc/Renderer/Html.php(48): XF\Template\Template->render()
#12 src/XF/Mvc/Dispatcher.php(332): XF\Mvc\Renderer\Html->renderView('XF:Widget\\Edit', 'admin:widget_ed...', Array)
#13 src/XF/Mvc/Dispatcher.php(303): XF\Mvc\Dispatcher->renderView(Object(XF\Mvc\Renderer\Html), Object(XF\Mvc\Reply\View))
#14 src/XF/Mvc/Dispatcher.php(44): XF\Mvc\Dispatcher->render(Object(XF\Mvc\Reply\View), 'html')
#15 src/XF/App.php(1934): XF\Mvc\Dispatcher->run()
#16 src/XF.php(333): XF\App->run()
#17 admin.php(13): XF::runApp('XF\\Admin\\App')
#18 {main}