login.php is located in the htsrv folder (which you've renamed). You'll have to take care to edit $htsrv_url in /conf/_advanced.php and perhaps other places, too.

There's at least one post in the forums about this (renaming htsrv), so please follow those instructions.

Also, setting PHP's error_reporting to E_ALL (and looking at the output or webserver error log (if you do not display_errors)) might help to trigger the error.

Thanks for your reply! I'll check for other files where the login appears and update them. I was worried that a spammer had somehow accessed my site because I've been seeing an uptick in referral spam in the last few days.

As for finding posts on renaming htsrv, that's what I thought I did! I followed a forum thread on fighting spam to the link I posted. It's hard sometimes when you're not familiar with the ins and outs of B2E to tell what's out of date or incorrect info in these forums.

Thanks again,
Chris

I made a mistake when I edited the htsrv section of the conf / _advanced.php file:

$htsrv_subdir = 'htsrvrenamed/'; // Subdirectory relative to base

$htsrv_dirout = '../'; // Relative path to go back to base

$htsrv_url = $baseurl.$htsrv_subdir; // You should not need to change this

The way it's shown above is correct now. My mistake was in changing the line $htsrv_url = $baseurl.$htsrv_subdir to $htsrv_url = $baseurl.$htsrvrenamed_subdir