Thank you for the details, I was able to log-in with them.
I'm able to see the theme selector on the theme options panel: https://i.imgur.com/dxScT6O.png
Was this the issue, or something else?
On some themes, the input background is the same as the overall background, you might also want to change that: https://i.imgur.com/1YnsGng.png
If you like my products, don't forget to rate them on codecanyon :)