RESOLUTION
Solutions:Option 1.
Check PATH_SITE_STUDIO value in ~cpanel/shiva/psoft_config/hsphere.properties file.
If URL contains domain name, all other SS conf files should contain domain name.
If it contains IP, then you can find SS conf files IP in /hsphere/shared/SiteStudio/psoft_config/ dir.
Option 2.
If in the ~cpanel/apache/logs/error_log the following message "java.sql.SQLException: Password authentication failed for user 'wwwuser' " appears when you are trying to log into, it means that incorrect password for the wwwuser is set in the masonry.properties file.
It is located in /hsphere/shared/SiteStudio/psoft_config/ (DB_PASSWORD variable)
Set the correct password for the wwwuser. You can get it by executing the following:
cat ~cpanel/shiva/psoft_config/hsphere.properties | grep DB_PASSWORD | awk '{print $3}'