Admin Home Link Won't Load

I've used the same Admin Home bookmark for years. It worked about a month ago. Now I get this error message:

This page isn’t working
https://www.highcastlecrafts.com is currently unable to handle this request.
HTTP ERROR 500

I've spoken to support at Bluehost, but they couldn't do anything (at least the one person I spoke with couldn't).

Database server
Server: Localhost via UNIX socket
Server type: Percona Server
Server connection: SSL is not being used Documentation
Server version: 5.7.23-23 - Percona Server (GPL), Release 23, Revision 500fcf5
Protocol version: 10
User: cpses_edq6svrqvm@localhost
Server charset: UTF-8 Unicode (utf8)

Web server
cpsrvd 11.110.0.24
Database client version: libmysql - mysqlnd 8.1.27
PHP extension: mysqli Documentation curl Documentation mbstring Documentation
PHP version: 8.1.27

phpMyAdmin
Version information: 5.2.1

How can I access the admin for my site? Thanks in advance for any help.

See if this helps:

https://www.zen-cart.com/showthread.php?229771-IntlDateFormatter-php-issue

Bluehost will only let me choose PHP versions 8.1, 8.2, and 8.3.

The address my Admin Home bookmark links to is https://www.highcastlecrafts.com/admin/index.php?cmd=login&camefrom=index.php (where, here, I put "admin" in place of the actual name).

Does this address look correct? Thanks again.

HighCastleCrafts:

The address my Admin Home bookmark links to is https://www.highcastlecrafts.com/admin/index.php?cmd=login&camefrom=index.php (where, here, I put "admin" in place of the actual name).

Does this address look correct? Thanks again.
That looks correct. For a server-500 error, there's a /logs/myDebug-adm-{date/time information}.log file waiting to tell you/us what's going on.

Note the the log will contain you admin directory's name, so make sure you obscure/edit those if you post the information online!