Just upgraded from J25 to J3 yesterday, and now I get error in my log:
mod_fcgid: stderr: PHP Fatal error: Call to a member function getBool() on null in ..../libraries/cms/module/helper.php on line 229

STEPS TO REPLICATE:

.../index.php?option=com_community&view=videos&task=app&videoid=29953&app=walls&Itemid=86

Hi, Jeroen.

Error is caused by mod_fcgid.
Try to locate this module and disable it.
It's not part of JomSocial package so error is rather not related with JomSocial...

What? Of course mod_fcgid is not part of JS, it's part (fastcgi module) of the web server (a fine working web server btw)!

I cannot just move to a different web server just because of JS.

So this answer didn't really help. Please try again.

Hi.

Please provide us working administrator credentials.
I can't login to your site.
Please, edit your first post and add credentials to corresponding fields.

Error is in Joomla! core: /libraries/cms/module/helper.php on line 229
This part is executing:

// Dynamically add outline style
		if ($app->input->getBool('tp') && JComponentHelper::getParams('com_templates')->get('template_positions_display'))
		{
			$attribs['style'] .= ' outline';
		}

Looks like I'll prefer solving this myself. I was hoping it would be a well-known error for you guys.

Hi, Jeroen.

No, this issue was reported for the first time... and seems to be an Joomla! issuues than JomSocial.