You could try putting this at the top of the script: 
use CGI::Carp qw(set_die_handler);
BEGIN {
    sub handle_errors {
        my $msg = shift;
        print "Content-Type: text/html\n\n";
        print "$msg";
    }
    set_die_handler(\&handle_errors);
}

[download]
This will change the server's response code from 500 to 200 and would give you content like: 
[Wed Oct  5 23:53:36 2021] test.cgi: Died at /web/test.cgi line 15.

[download]
However, the fact that the script you are calling with LWP::Simple does not appear in the logs would suggest that it is not actually being called.

I would not discount the role of user-agent - non-standard user-agents can be blocked to prevent web scraping. Maybe something at the server level was updated or reconfigured by your hosting company? To test you will need to use LWP::UserAgent directly.

use LWP::UserAgent;
my $ua = LWP::UserAgent->new;
$ua->agent('Mozilla/5.0'); # play with this string

my $response = $ua->get('http://localhost/web/test.cgi');
if ($response->is_success) {
    print $response->decoded_content;
}
else {
    print $response->status_line;
}

[download]

In reply to Re: CGI::Carp fatalsToFile by tangent
in thread CGI::Carp fatalsToFile by Bod

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.