HTTP ERROR 500 when opening some template pages

[valan]

Few days ago I've discovered that some specific template pages can't be opened in admin page edit. Browser returns HTTP ERROR 500.

At the same time it looks like all these pages are accessible from API, and there is Lister that correctly shows all pages with this template.

I've debugged down to core and found that script fails in ProcessPageEdit.module at 220 line: $out .= $this->form->render()

My PW core knowledge is not enough to dig further so I need help to find root cause and fix problem. Thanks for any advice.

PW 2.7.2, PHP 5.5

[valan]

Well... the problem was with field which had ChosenSelect inputfield. Posted issue in module support board - https://processwire.com/talk/topic/8955-inputfieldchosenselect/

Q is closed so far.