can confirm.
common.php (line 3728 and 3066) causes the error in Multisite when allocating memory.
Please try disabling the EWWW debugging setting and then re-upgrading and let me know what happens.
When/if it breaks, you can just delete the plugin folder, and reinstall 2.5.4 from here: https://downloads.wordpress.org/plugin/ewww-image-optimizer.2.5.4.zip
Potential fix, soon as I have confirmation from someone (besides myself) that it works, I’ll release it officially: https://downloads.wordpress.org/plugin/ewww-image-optimizer.zip
Hi,
fast work 🙂
as I am not at office till monday, I can´t double-check it till then. Anybody else could do?
Cheers!
Thank you, replacing with your new folder just now brought my site back from 500 Internal Server Error limbo.
Merry Christmas,
-GD
Just rolled out 2.5.6 with the fix!