Hi Xing,
are you redirect from http to https when open a popup?
Regards
Rahul Sahu
Hello Xing,
Here you have a nice explanation about this error: https://stackoverflow.com/questions/25098021/securityerror-blocked-a-frame-with-origin-from-accessing-a-cross-origin-frame
Even the protocol (http, https, etc) must be the same, to be considered the same origin.
This is not an OutSystems error.
Cheers.