Ngrok is considered a potential security risk, and it cannot be used.

Can you elaborate on why Ngrok is considered a security risk?

Please see the attached image. The decision was made by the eTransaction team. I am not happy about it because it complicates testing, but it is what it is.

You can find that on https://language-tools.ec.europa.eu/#documentation
"Guidelines on integrating eTranslation in your web pages", next "How to request translations using the eTranslation webservice" and "SecuredWSEndPointHandlerService"

Tested and works as delcared. RTBC+1

Automatically closed - issue fixed for 2 weeks with no activity.