Hi,
You can try following installation commands on a fresh server.
bash <( curl -k https://raw.githubusercontent.com/litespeedtech/ols1clk/master/ols1clk.sh ) -w
apt-get install lsphp74-intl -y
curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer
chmod +x...