goes fantastic! many thanks.

btw, a link named "Go to (setting requires sandbox - click here) and navigate to System Administration > Security > Applications > Web Applications" in PartTwo the same place with the link"https://52773-1-7a687984.try.learning.intersystems.com/csp/sys/UtilHome.csp?IRISUsername=tech&IRISPassword=demo
", . goes failedBadGateway ?

acceptedAnswer. mark here orNot=P

at the same place, Part2: WebServices with ObjectScript, mentioned about "overwrite server" option. is it a menu or button? since hard to find it on Theia{the vscode-styled webIde}.