[Feature request]: Better Error Message

[Mannshoch]

Is your feature request related to a problem? Please describe.

Every time a connection do not work I get the error message i should open ports. In most cases this is wrong.

Describe the solution you'd like

better Error Message and/or the possibility to test my connection.

• "Port x is closed port y is open"
• "the stream closed directly after opening"
• etc.

Describe alternatives you've considered

Try and Error.
I had my android beside the sunshine server and tried to found the problem (it was the pre-cmd)

Screenshots

No response