Hello Fumi,
there is no internal community. All FreeMASTER issues are discussed publicly. You can always reach out to me if you need to discuss anything internally.
The issue you describe seems like a problem with the web address which probably got outdated. It is hardcoded in the MCU application (in one of the FreeMASTER TSA tables). I will let other users to comment on this thread.
Did you try the ZIP attached to the other "resolved" thread?
Regards,
Michal