Admin panel, backoffice- blank page

[Poldream]

Hi All, 

I'm looking for feedback and help. 

I'm currently trying to login in to the backoffice but my admin panel site is blank. No areas to enter login and password. 

It was propably happened after use option "Movie JavaScript to the end". I've tried before to put google remarketing tag on site, to the footer and header, then footer was crashed. Add to cart is also not working. Can anybody help me with this problem? 

 

Prestashop 1.6

 

Sorry for my language.