Issue

Installation processing on cPanel Plugin get stuck at the stage Download Vender.

Cause

LiteSpeed Web Server has a limit for timeout server processing with PHP script.

Solution

Add manual configuration in .htaccess file by the following rule

RewriteEngine On
RewriteRule .* - [E=noconntimeout:1]
RewriteRule .* - [E=noabort:1]

Ref : https://www.litespeedtech.com/support/wiki/doku.php/litespeed_wiki:php:run-without-timeouts