Extensions Broken in 3.1.4
From Joomla! Documentation
Some extensions that worked in 3.1.1 give a 500 error in version 3.1.4.
Versions affected
What is the cause
Not specified
What is the fix
If you have this problem you can install this hotfix just as you would a normal extension. Use Extension Manager → Install
For any other extension related issues, please contact the extension developer for information.