Related to: #8925

Steps to reproduce the issue

Quickest was I can think to test is to download my extension:

https://github.com/JoomJunk/shoutbox/releases/tag/8.1.4

Expected result

On Joomla 3.5, is works perfectly fine. The shouts are displayed. Should also work fine on Joomla 3.6

Actual result

On Joomla 3.6, none of the shouts are displayed. We've extended JLayoutFile and have the following:

protected function refreshIncludePaths() { ... }

Having looked at the JLayoutFile class, this function appears to be deprecated, but was instead removed.

The fix was to change the above function to:

public function clearIncludePaths() { ... }