And also try

zw sc

after

Set sc=stream.LinkToFile("test_test.json")

Or, if you connect from external java program to IRIS -- check DelimitedIdentifiers option:
https://docs.intersystems.com/iris20243/csp/docbook/DocBook.UI.Page.cls?...

Thank you Luis Angel.

Other possibility -- use CPF Merge

Define an SSL configuration with CreateSSLConfig, then modify superserver with ModifyServer to assign this SSL configuration
https://docs.intersystems.com/iris20242/csp/docbook/DocBook.UI.Page.cls?...