White screen on save

@subtilty

what theme and what plugins you use?

It is a custom theme and I have disabled all plugins and still get white screen.

@subtilty

first try it with a default WP theme.

Even with default theme it still white screens on save.

which php version is used?

PHP Version 5.5.25

is OK.

Can you make a new fresh install of WordPress and qTranslate X as only plugin?