It looks like there is something wrong with lsphp7 binary I've replaced it with lsphp5 binary available at http://www.litespeedtech.com/packages/lsphp5_bin/x86_64/lsphp5 and RainLoop seems to be working.
PHPMyAdmin does not seems to work as this is very old PHP
Fatal error: Call to undefined function Symfony\\Polyfill\\Mbstring\\iconv_strpos() in /usr/local/lscp/cyberpanel/phpmyadmin/vendor/symfony/polyfill-mbstring/Mbstring.php on line 490
We will fix the error in lsphp binary.
Any update on this fix? Thanks!