Good afternoon - I have read the thread the same problem. prestashop 1.5.6 
I cleaned the cache, smart, and delete files from cache.
Replaced file Adminschebrotate.php
the problem is not solved.
When you try to add - white screen.
I hosting a2host
server is configured according to official regulations prestshop
site is stable.
But the module is not present.
Help please :?
screnshots:
settings screnshot
		 
	
WebRotate360
		 
	
after a click to add a new
		 
	
			
			I cleaned the cache, smart, and delete files from cache.
Replaced file Adminschebrotate.php
the problem is not solved.
When you try to add - white screen.
I hosting a2host
server is configured according to official regulations prestshop
site is stable.
But the module is not present.
Help please :?
screnshots:
settings screnshot
 
	WebRotate360
 
	after a click to add a new
 
	 
				