Hi Manfred,
Sorry for the delay, I was out for a couple of days.
But I found what the issue was when I was making a sample project.
When I do this.
j.PostString("https://sub_domain.domain.com/api","ABC")
It goes wrong and I get the error
ResponseError. Reason: java.io.IOException: Android internal error, Response:
java.io.IOException: Android internal error
When I do this
j.PostString("
https://subdomain.domain.com/api","ABC")
It goes OK.
It seems that underscores in the url are not handle well. In other applications, like postman, it is no problem to use underscores.
Best regards
Andre