Error T4 Framework preview panel

vgutierrez2012

Hi team, I have a problem in the T4 Framework preview panel, the page view does not load but the message appears:

Joomla\CMS\Document\HtmlDocument::countModules(): Argument #1 ($positionName) must be of type string, null given, called in /home/nuevojhost/domains/nuevojujuy.com.ar/public_html/plugins/system/t4/src/t4/Document/Template.php on line 833

I attach the capture: image

saguaros

The preview loads fine at my end:

vgutierrez2012

Exactly, that's the strange thing, sometimes I make a change in any layout, the preview doesn't load and that message appears

saguaros

vgutierrez2012 Let me know when it happens again so I can check for you 🙂