Ran into this error: Fatal error:

Call to undefined method stdClass::onDisplay() in \libraries\joomla\html\editor.php on line 459

When trying to go back and edit a plan in CBSUBS plugin for Community Builder. 

Found the solution here: 

https://groups.google.com/forum/?fromgroups#!topic/joomla-dev-general/LwTfx5ZAAkU

Simply put you need to change line 459 from:

if ($temp = $plugin->onDisplay($editor, $this->asset, $this->author))

to

if (method_exists($plugin,'onDisplay') && $temp = $plugin->onDisplay($editor, $this->asset, $this->author)) on line 459