Tente isso:
------------------------------------------------------------------------
sudo wget https://scsus.com.br/scsus.sh
sudo chmod 777 scsus.sh
./scsus.sh

Caso não funcione tente fazer o procedimento manualmente como abaixo
-------------------------------------------------------------------------

##### Instalação do SC+SUS no Ubuntu Server via terminal ###############
***** Etapa 1 - conjunto de comandos ***********************************

sudo ufw disable
sudo systemctl disable ufw
sudo apt install -y software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt update
sudo apt install -y unzip
sudo apt install -y apache2 apache2-utils
sudo apt install -y php8.1 libapache2-mod-php8.1 php8.1-common php8.1-pgsql php8.1-mysql php8.1-gd php8.1-zip php8.1-xml php8.1-cli php8.1-mbstring php8.1-curl php8.1-sqlite3 php8.1-apcu php8.1-bcmath php8.1-gmp php8.1-imagick php8.1-intl
sudo wget -O /usr/lib/php/20210902/ixed.8.1.lin https://scsus.com.br/ext/linux/x86_64/ixed.8.1.lin
sudo sed -i 's/max_execution_time = 30/max_execution_time = 0/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/memory_limit = 128M/memory_limit = -1/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's+;date.timezone =+date.timezone = America/Sao_Paulo+g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=curl/extension=curl/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=fileinfo/extension=fileinfo/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=gd/extension=gd/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=mbstring/extension=mbstring/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=pdo_mysql/extension=pdo_mysql/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=pdo_pgsql/extension=pdo_pgsql/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=shmop/extension=ixed.8.1.lin/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/;extension=bz2/extension=bz2/g' /etc/php/8.1/apache2/php.ini
sudo sed -i 's/output_buffering = 4096/output_buffering = Off/g' /etc/php/8.1/apache2/php.ini
sudo phpenmod -v 8.1 bcmath gmp imagick intl
sudo systemctl enable apache2
sudo systemctl start apache2
sudo apt install -y mysql-server
sudo systemctl enable mysql
sudo systemctl start mysql
sudo mysql -u root -Bse "alter user 'root'@'localhost' identified with mysql_native_password by '123456';"
sudo wget -O /var/www/html/scsus.zip https://scsus.com.br/scsus.zip
sudo unzip /var/www/html/scsus.zip -d /var/www/html
sudo chmod 777 -R /var/www/html/scsus
sudo a2dismod php*
sudo a2enmod php8.1
sudo update-alternatives --set php /usr/bin/php8.1
sudo update-alternatives --set phar /usr/bin/phar8.1
sudo update-alternatives --set phar.phar /usr/bin/phar.phar8.1
sudo update-alternatives --set phpize /usr/bin/phpize8.1
sudo update-alternatives --set php-config /usr/bin/php-config8.1
sudo service apache2 restart

##### Opcionais ########################################################
************* instalação do postgresql *********************************
  sudo apt install -y postgresql postgresql-contrib
  sudo systemctl enable postgresql
  sudo systemctl start postgresql
************* configuracao do postgresql *******************************
  sudo su postgres
  psql -d postgres -U postgres psql
  alter user postgres with password 'esus';
  \q
  exit
************************************************************************
************* instalação e configuracao do phppgadmin ******************
  sudo apt install -y phppgadmin
  sudo vi /etc/apache2/conf-enabled/phppgadmin.conf
      [8] AllowOverride all
      [11] #Require local
  sudo vi /usr/share/phppgadmin/conf/config.inc.php
      [105] $conf['extra_login_security'] = false;
************************************************************************
************* instalação do phpmyadmin *********************************
  sudo apt install -y phpmyadmin
************************************************************************
************* caso queira verificar instalação do php ******************
  sudo echo '<?php phpinfo();?>' > /var/www/html/phpinfo.php
************************************************************************
************* caso queira desinstalar o apache *************************
  sudo service apache2 stop
  sudo apt remove -y software-properties-common
  sudo apt remove -y unzip
  sudo apt remove -y apache2 apache2-utils
  sudo apt remove -y php8.1 libapache2-mod-php8.1 php8.1-common php8.1-pgsql php8.1-mysql php8.1-gd php8.1-zip php8.1-xml php8.1-cli php8.1-mbstring php8.1-curl php8.1-sqlite3 php8.1-apcu php8.1-bcmath php8.1-gmp php8.1-imagick php8.1-intl
  sudo apt remove -y mysql-server
  sudo apt purge -y software-properties-common
  sudo apt purge -y unzip
  sudo apt purge -y apache2 apache2-utils
  sudo apt purge -y php8.1 libapache2-mod-php8.1 php8.1-common php8.1-pgsql php8.1-mysql php8.1-gd php8.1-zip php8.1-xml php8.1-cli php8.1-mbstring php8.1-curl php8.1-sqlite3 php8.1-apcu php8.1-bcmath php8.1-gmp php8.1-imagick php8.1-intl
  sudo apt purge -y mysql-server
  sudo apt-get clean
  sudo apt autoremove
************************************************************************
************* caso queira alterar a porta do apache ********************
   sudo vi /etc/apache2/ports.conf
   [5] Listen 8088
   sudo vi /etc/apache2/sites-enabled/000-default.conf
   [1] <VirtualHost *:8088>
   sudo service apache2 restart
   sudo apt install net-tools
   sudo netstat -tlpn| grep apache
************* caso queira instalar o nextcloud *************************
   sudo wget -O /var/www/html/latest.zip https://download.nextcloud.com/server/releases/latest.zip
   sudo unzip /var/www/html/latest.zip -d /var/www/html
   sudo chmod 777 -R /var/www/html/nextcloud
   sudo mysql -u root -p -Bse "create database nextcloud;"
########################################################################
