Customized and original login page

Hi there!

So far I am very satisfied with the plugin, but I still have one question.
The original WordPress login page will be replaced by an own customized login page. Is it still possible to access the original login page?
I imagine the case that a parser error occurs while rendering the website. Then it would no longer be possible to access the customized login page. The original login page would then still be accessible.

Cheers
Frank

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