Steps to reproduce

Install Joomla 4.0.0-rc7-dev
Change configuration options

Expected result

The site load stylesheets/javascript properly.

Actual result

No stylesheets are loading, and any actions reliant on javascript do not function.

System information (as much as possible)

PHP Version: 7.4.22

class JConfig {
	public $offline = false;
	public $offline_message = 'This site is down for maintenance.<br />Please check back again soon.';
	public $display_offline_message = 1;
	public $offline_image = '';
	public $sitename = 'Test';
	public $editor = 'tinymce';
	public $captcha = '0';
	public $list_limit = 20;
	public $access = 1;
	public $debug = false;
	public $debug_lang = false;
	public $debug_lang_const = true;
	public $dbtype = 'mysqli';
	public $host = '127.0.0.1';
	public $user = '[...]';
	public $password = '[...]';
	public $db = '[...]';
	public $dbprefix = 'vireh_';
	public $dbencryption = 0;
	public $dbsslverifyservercert = false;
	public $dbsslkey = '';
	public $dbsslcert = '';
	public $dbsslca = '';
	public $dbsslcipher = '';
	public $force_ssl = 0;
	public $live_site = '';
	public $secret = '[...]';
	public $gzip = true;
	public $error_reporting = 'default';
	public $helpurl = 'https://help.joomla.org/proxy?keyref=Help{major}{minor}:{keyref}&lang={langcode}';
	public $offset = 'America/Toronto';
	public $mailonline = true;
	public $mailer = 'mail';
	public $mailfrom = '[...]';
	public $fromname = 'Test';
	public $sendmail = '/usr/sbin/sendmail';
	public $smtpauth = false;
	public $smtpuser = '';
	public $smtppass = '';
	public $smtphost = 'localhost';
	public $smtpsecure = 'none';
	public $smtpport = 25;
	public $caching = 0;
	public $cache_handler = 'file';
	public $cachetime = 15;
	public $cache_platformprefix = false;
	public $MetaDesc = '';
	public $MetaAuthor = true;
	public $MetaVersion = false;
	public $robots = '';
	public $sef = true;
	public $sef_rewrite = true;
	public $sef_suffix = false;
	public $unicodeslugs = false;
	public $feed_limit = 10;
	public $feed_email = 'none';
	public $log_path = '/home/test/domains/test.domain.ca/public_html/administrator/logs';
	public $tmp_path = '/home/test/domains/test.domain.ca/public_html/tmp';
	public $lifetime = 60;
	public $session_handler = 'database';
	public $shared_session = false;
	public $session_metadata = true;
	public $memcached_persist = true;
	public $memcached_compress = false;
	public $memcached_server_host = 'localhost';
	public $memcached_server_port = 11211;
	public $redis_persist = true;
	public $redis_server_host = 'localhost';
	public $redis_server_port = 6379;
	public $redis_server_db = 0;
	public $cors = false;
	public $cors_allow_origin = '*';
	public $cors_allow_headers = 'Content-Type,X-Joomla-Token';
	public $cors_allow_methods = '';
	public $behind_loadbalancer = false;
	public $proxy_enable = false;
	public $proxy_host = '';
	public $proxy_port = '';
	public $proxy_user = '';
	public $massmailoff = false;
	public $replyto = '';
	public $replytoname = '';
	public $MetaRights = '';
	public $sitename_pagetitles = 1;
	public $session_filesystem_path = '';
	public $session_memcached_server_host = 'localhost';
	public $session_memcached_server_port = 11211;
	public $session_redis_persist = 1;
	public $session_redis_server_host = 'localhost';
	public $session_redis_server_port = 6379;
	public $session_redis_server_db = 0;
	public $frontediting = 0;
	public $block_floc = 1;
	public $log_everything = 0;
	public $log_deprecated = 0;
	public $log_priorities = array('0' => 'all');
	public $log_categories = '';
	public $log_category_mode = 0;
	public $cookie_domain = '';
	public $cookie_path = '';
	public $asset_id = '1';
	public $redis_server_auth = '';
	public $session_redis_server_auth = '';
}

Additional comments

Unfortunately, I'm at a loss for what exactly I did to produce this bug. I was looking through the main site configuration setting various options to debug my custom components/modules in the new environment, and after a save nothing is working correctly anymore.

I've included a redacted copy of my configuration file in case it helps.