Question Can't upgrade to Joomla 3.6.3

When I update Joomla, Kunena stops working.

I get this error

Rendering Error in layout topics/default: Error decoding JSON data: Syntax error. Please enable debug mode for more information.

updated to Kunena 5.0.3 first. Also happened with 5.0.2

Please enable kunena debug: backend - kunena - configurations

And look again, you will see the real issue now.

same message, no difference

first login as admin then check the error page

I was logged in as superuser.

When you say error page, do you mean the page that has the error, or is there a specific page when using debug mode?

This is what I get in the page

Rendering Error in layout topic/default: Error decoding JSON data: Syntax error in /home/vvgsuwgv/public_html/components/com_kunena/controller/topic/item/display.php on line 367
Layout was rendered in /home/vvgsuwgv/public_html/index.php on line 49

This is what I get at the top of the page

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 57

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 89

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 121

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 141

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 191

Strict Standards: Only variables should be assigned by reference in /home/vvgsuwgv/public_html/plugins/system/kunenasocialshare/kunenasocialshare.php on line 239
Contact Us

Notice: Use of undefined constant php - assumed 'php' in /home/vvgsuwgv/public_html/templates/it_community3/index.php on line 97

line 367...

looks like the JFactory variable is off.

Any thoughts on that?

first try to disable the kunenasocialshare plugin. if its working then there is a bug on that plugin

I disabled that plug in and I'm still getting the generic error

Rendering Error in layout topics/default: Error decoding JSON data: Syntax error. Please enable debug mode for more information.

But nothing else. No verbose errors. But it still doesn't work.

Looks like there might be an issue with Joomla.