Can't login - no entry fields showing
It's probably a layout/theming issue. See if you can find the fields with Chrome Inspector or Firebug.

If you can't, you can try this (very, very, very) dirty workaround:

Open to the /modules/system/system.module file in an editor and find the system_init() function.

Inside the function put:

global $user;
$user = user_load(1);


Every visitor will now be user 1.

Go to appearance and change your theme to Bartik.

Remove the 2 lines from the system_init().

DO NOT EVER DO THIS ONLINE! :)