Nothing changed in settings, but protected pages do not work

I submitted a couple of forms on the plugin website and also sent emails, but no response. I am hoping this works better.
PLUGIN: Password Protected Store for WooCommerce 
WooCommerce Store: Working with Printful fulfillment services
Hosting by GoDaddy: Launch – Web Hosting Plus (AutoSSL)
Theme: Elegant Themes DIVI

PROBLEM: I have not changed any thing to the website but this problem started. The website opens fine and so do pages that are not part of the password protected store. But the password protected store does not open.

Main page opens: https://store.HBMM-National.org

Page that will not open: https://store.hbmm-national.org/shop/

Unprotected page opens: https://store.hbmm-national.org/product-category/hbmmsupport/

I can open everything when I am logged in to the admin portion of the site, 

Thanks in advance for any assistance.

The page I need help with: [log in to see the link]