Can't access WP admin panel installed on subdomain

I created the subdomain using this guide.


Then I installed Wordpress on the subdomain using this guide.


The installation seems to be successful. I can go to the subdomain and I see a Wordpress installation. The theme seems to be messed up. However when I try to login by going to the provided URL or going to the Manage Applications page and clicking Login, I get a 404 error. 


Screen Shot 2018-10-26 at 12.16.19 AM.png


How can I fix this?