I just had a situation where I clicked on “edit” on a configurable product in the Magento Admin and… Nothing happened. I got presented a blank page.
This is most likely caused because of a memory size limitation in the php.ini file. Good news is that it’s easy to change:
You just have to edit the php.ini file on your server (or ask the hosting provider to do so) and change the value ‘memory_limit’ to at least 128M. It should look like this “memory_limit = 128M”.
Good luck!

