Localhost 3010 error in GST Offline Utility usually occurs due to bad installation, Node or Java issues, or browser cache. Fix by uninstalling GST utility and Node, clearing Chrome cache, updating Java, reinstalling latest utility, and opening localhost:3010.
PLEASE UNINSTALL THIS OFFICE UTILITY AND "NODE" ALSO BECAUSE NODE IS INSTALL AT THE TIME OF GST OFFICE UTILY AUTOMETICALLY SO PLEASE UNINSTALL GST AND NODE ALSO