Reinstall won't work / PHP7 purge screwup

So in my infinite wisdom.... or epic stupidness, I ran apt-get purge php7*. I had php8 installed and thought it would be fine. However, not so much. Now when I reinstall ispconfig via ispconfig-update.sh --force I get the following errors. I get a login screen, but as soon as I log in, the only thing I see is the search box, logout button, and ispconfig logo. Nothing else shows. I've reinstalled section 10 Install Apache Web Server and PHP of the Perfect Server Buster tutorial and rebooted, but to no avail. Thoughts on how to fix this would be greatly appreciated.

This application will update ISPConfig 3 on your server.

PHP Warning: Undefined array key "do_backup" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 86
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 92
Shall the script create a ISPConfig backup in /var/backup/ now? (yes,no) [yes]:

Creating backup of "/usr/local/ispconfig" directory...
Creating backup of "/etc" directory...
Checking ISPConfig database .. OK
Starting incremental database update.
Loading SQL patch file: /tmp/update_runner.sh.tKQ8fuZx5X/install/sql/incremental/upd_dev_collection.sql
PHP Warning: Undefined array key "reconfigure_permissions_in_master_database" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 86
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 92
Reconfigure Permissions in master database? (yes,no) [no]:

PHP Warning: Undefined variable $firewall_server_enabled in /tmp/update_runner.sh.tKQ8fuZx5X/install/update.php on line 359
PHP Warning: Undefined variable $xmpp_server_enabled in /tmp/update_runner.sh.tKQ8fuZx5X/install/update.php on line 359
PHP Warning: Undefined array key "reconfigure_services" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 86
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 92
Reconfigure Services? (yes,no,selected) [yes]:

Configuring Postfix
Configuring Dovecot
Configuring Mailman
Configuring Spamassassin
Configuring Rspamd
PHP Warning: Undefined array key "rspamd_redis_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1879
PHP Warning: Undefined array key "rspamd_redis_bayes_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1881
PHP Warning: Undefined array key "rspamd_redis_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1879
PHP Warning: Undefined array key "rspamd_redis_bayes_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1881
PHP Warning: Undefined array key "rspamd_redis_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1879
PHP Warning: Undefined array key "rspamd_redis_bayes_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1881
PHP Warning: Undefined array key "rspamd_redis_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1879
PHP Warning: Undefined array key "rspamd_redis_bayes_password" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 1881
Configuring Getmail
Configuring BIND
PHP Warning: Undefined variable $config_dir in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 2132
Configuring Pureftpd
Configuring Apache
Configuring vlogger
Configuring Apps vhost
Configuring Jailkit
Configuring Ubuntu Firewall
Configuring Database
Updating ISPConfig
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/update.php on line 546
PHP Warning: Undefined array key "ispconfig_port" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 129
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 135
ISPConfig Port [8080]:
PHP Warning: Undefined array key "create_new_ispconfig_ssl_cert" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 86

PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 92
Create new ISPConfig SSL certificate (yes,no) [no]:

PHP Warning: Undefined array key "reconfigure_crontab" in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 86
PHP Warning: Trying to access array offset on value of type null in /tmp/update_runner.sh.tKQ8fuZx5X/install/lib/installer_base.lib.php on line 92
Reconfigure Crontab? (yes,no) [yes]:

Updating Crontab
Restarting services ...
PHP Warning: Undefined array key "init_script" in /tmp/update_runner.sh.tKQ8fuZx5X/install/update.php on line 640
Update finished.​