Blank page - Admin panel #how to fix it

[want.ro]

We had a small problem with blank pages every time we tried to update something from admin panel.

I have tried in vain to find a solution on Prestashop. After i have tried all the non-sense solutions from the forum, i have decided to do it by myself. So i have opened the error.log from the server, i havent tryed debug mode. I had this message> Warning: Cannot modify header information - headers already sent by..admin line1 etc

So i looked around in admin.php from translations and i have noticed that it was modified, so i have just copied backed admin.php and the problem was fixed.

All the best from Bucharest..

Edited September 27, 2016 by want.ro (see edit history)

[shokinro]

There are some multiple things that will cause this kind of error.

 

not sure if yours is the case, if any PHP class that closes code by ?> and there is any white spaces after that, it will cause same error.