ERR_EMPTY_RESPONSE error

Can you check your server error log to see what trigger the white screen?

confirmed.after the upgrade to version 2.5.5
online site is down (debian, MS WP4.4, PHP5.6, MySQL 5.5, Apache)
local site is down (windows, MS WP4.4, PHP5.6, MySQL 5.5, Apache)

Nothing in the logfiles. Only blank page at web

after removing the plugins folder servers working again

looks like a memory issue with the debugging option. Can either of you try disabling EWWW’s debugging option and then re-upgrading?

In the meantime, I’ve got to figure out what debugging statements I added that caused it to go nuts.

Potential fix, soon as I have confirmation from someone (besides myself) that it works, I’ll release it officially: https://downloads.www.ads-software.com/plugin/ewww-image-optimizer.zip

Just rolled out 2.5.6 with the fix!

Thank you sir!