When we disable tls 1.0 the octo.exe can not communicate with the octopus server. Gives the error - Unable to connect to the octopus deploy server. The underlying connection was closed.
If tls 1.0 is enabled it works as expected.
I noticed in a post on this site from 2016 it indicated this issue was fixed.
Thanks for reaching out! Couple of troubleshooting questions to try to understand your scenario:
Which version of Octo.exe are you running?
What do you see in the console output when you run it with TLS 1.0 disabled? Can you send me a full screenshot of this besides the text piece you pasted?