Password in subdomain folder

Hi all, newbie first post… hope it’s simple :wink:

Having set-up a password protected directory, I can not now access it using the proper URL. :@

Let me try to explain…
I have set up a subdomain on my site.

Inside that, I have a folder that is password protected.

Everything works fine if I access it as:

but If I try: -> I receive a ‘No input file’ error :frowning:

Any help would be great