WordPress only displays “error”

In trying to copy over a theme and partially start over I ran into an issue where WordPress wouldn’t show anything but one word, error.  Well, that’s helpful.  Searching the wordpress forums I found that the problem is actually a security measure from Better WP Security.  Since my newly copied/created theme had so many missing files (404 errors) it blocked me out.  Deactivating that plugin (programmatically) caused the issue to go away.

Source:  http://wordpress.org/support/topic/getting-one-word-error-when-logging-into-wp-loginphp