Hi. So title says it all. Recently getting blank white page after every saving of a configuration of a plugin, theme, or WP options. It shows up also after editing/posting , etc.
The changes are implemented , but I still get the blank page and have to go back and refresh everytime to make sure the changes are saved.
I checked my theme, there is no blank line in the top of header.php. (in fact my header.php doesnt start with <?php but with
<!DOCTYPE html PUBLIC "-/....
Disabled W3 Total cache, but did not help.
What could it be ?