PHP Fatal error: Call to undefined function ctools_cleanstring()

[EDITED] Just installed FPP 1.5 and I'm getting WSOD due to this error "PHP Fatal error: Call to undefined function ctools_cleanstring() fieldable_panels_panes.module on line 664 in function fieldable_panels_panes_preprocess_panels_pane().

This is what I did. I created a fieldable_panels_panes, put pane in a panels page and term_view handler, and got WSOD.

Googled it, found nothing.

I've noticed the use of ctools_include('somefile') in other parts of the code when using ctools functions, and inserting

ctools_include('cleanstring');

just before the culprit will actually remove the problem.

I can't believe this is a bug since Google knows nothing about it - am I missing something?