File manage doesn't work.Help please!

[enricorock]

Hi everyone!
Since few days ago all were working good, today when i go to image manager the iframe doesn't work and it says Gateway timeout, the page seems to load all but the iframe.
All went starting wrong since i put some images on the uploads subfolder Gallery for the Gallery modules.Does anyone know why this problem it's currently annoying me, i've also tried a new installation end it makes appear the same problem
Can anyone help me.
Thank all of u.

[Dr.CSS]

What version of CMSMS?...

Check the system info page for any yellow ! or red X...

[enricorock]

I've just checked and i see a yellow exclamation
I enclosed the screenshot