Vanilla-cart theme

Hello!

I’m having problems with my website due to the theme “vanilla-cart”. I think i updated the site with this theme, the theme was not installed or downloaded completely and now the website is working properly and i can’t aces wp-admin. If i rename the theme then the page wp-admin loads up, but after i press log i get a white page.
I hope that by copying on the server the full theme, the website will work again properly.

Thank you
Bogdan