Website with errors and outdated software - has it been left?

[polonus]

See: https://sitecheck.sucuri.net/results/browserspy.dk
Warning-script error: https://labs.sucuri.net/signatures/sitecheck/warning.script_error/?11
Errors in jQuery JavaScript Library, headers - 1.4.2
7.2 Specifically in Node.JS.
See: https://sitereport.netcraft.com/?url=http://browserspy.dk
review: https://www.hupso.com/www/browserspy.dk

browserspy.dk is currently unable to handle this request.
HTTP ERROR 500

Get the idea that website has been left.

In the DOM we find

<br />
<b>Deprecated</b>:  Methods with the same name as their class will not be constructors in a future version of PHP; DB has a deprecated constructor in <b>-/home2/gemal/public_html/browserspy-dk/textpattern/lib/txplib_db.php</b> on line <b>23</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function mysql_connect() in -/home2/gemal/public_html/browserspy-dk/textpattern/lib/txplib_db.php:34
Stack trace:
#0 -/home2/gemal/public_html/browserspy-dk/textpattern/lib/txplib_db.php(50): DB-&gt;DB()
#1 -/home2/gemal/public_html/browserspy-dk/textpattern/publish.php(31): include_once('/home2/gemal/pu...')
#2 -/home2/gemal/public_html/browserspy-dk/index.php(82): include('/home2/gemal/pu...')
#3 {main}
  thrown in <b>-/home2/gemal/public_html/browserspy-dk/textpattern/lib/txplib_db.php</b> on line <b>34</b><br />

See remnants from the past: https://web.archive.org/web/20201203083713/http://browserspy.dk/headers.php

polonus (volunteer 3rd party cold recon website security analyst and website error-hunter)