Error Exeption: Method name must be a string

Permalink February 24, 2017 at 6:19 PM

Hi
I am running a multi-lingual site. I have been working on the content within the content blogs and all of a sudden got this error message:

Whoops \ Exception \ ErrorException (E_ERROR)
Method name must be a string
/usr/www/users/hotele/concrete/src/Editor/LinkAbstractor.php
                         if ($tag instanceof \Concrete\Core\Html\Object\Picture) {
                            foreach ($tag->getChildren() as $child) {
                               if ($child instanceof \HtmlObject\Image) {
                                  $child->$attr($val);
                               }
                            }
                         } else {
                            $tag->$attr($val);
                         }
                      }