wp-admin page blank

Whenever I activate this theme, I check on another browser and the /wp-admin/ login page is disables (appears all white) – I downloaded a non twentyxxxteen theme to get identify the source, and the random theme I downloaded to test shows this theme as having some bug with the wp-admin page?

I notice there is an /admin subdirectory inside the theme directory.

I have deleted and reinstalled this theme, both either through manually unziping or through activation and install in the WP dashboard.