Shopify recently made some changes to their customer layouts. If your customer login/registration pages are showing without formatting (looking something like the below image), please follow the steps below to fix this.

1. Click the  Online Store link on the left side of your Shopify dashboard, then click Themes and look for the ShowTime theme.

2. Click the the  ... button and choose Edit HTML/CSS from the drop-down menu as shown below.

3. Scroll down and locate the Templates folder. Locate all the files that begin with customer/ (there should be seven files)

4. Click on each to open them in the editor

5. The first line of code on each of these templates is

{% layout settings.customer_layout %}

Simply remove this line of code from each file, save, and your templates should display properly again.