My Theme is causing white pages

Hello,

Created my first WordPress theme from scratch. Tried to install it this morning but now i get a white page whenever i try to save or update something. And when i log out i get a white page when i go to myurl/wp-admin/. The weird thing is that everything worked fine when i tested it on my Localhost.

Did some searching and found out that theres probably a php error in my theme somewhere. Problem is i have no way of locating it since all i get are blank pages. Any help would be appreciated.

Kind regards,

R-J