Fatal Error in Input Filtering
From Joomla! Documentation
Some 3rd party extensions started giving fatal errors when doing data sanitisation in Joomla 3.5 and higher
Fatal error: Using $this when not in object context in libraries/joomla/filter/input.php on line 233
This pertains only to Joomla! version(s): 3.5.0 and higher
What is the cause
This is an issue in 3rd party extensions in Joomla 3.5 and higher where extensions that were incorrectly (since Joomla 1.6) calling Joomla's filtering API started to give fatal errors because of the additional check for whether to strip emoticons based on database support.
How to fix
Ensure your extensions are running the latest versions.
You can also search for uses of
and replace it with:
$filter = new JFilterInput; $filter->clean(SOMETEXT);