Invalid Discord server invitation link as well as `api.ksoft.si` refuses to connect.
I was glad as I came across this library, which I needed for my private music bot. I ran for obtaining an API key but I was sad to see these issues that no one saw.
Invalid Discord server Invitation ⤵

Solution- Make a permanent invitation link
https://api.ksoft.si doesn't respond ⤵

Hope that helps!
API is currently unavailable for unknown time. About the server invite, where did you find it? The permanent link is this. But you won't find anything interesting in it since the API is down.
I found it in readme.md and the description on pypi.org.
I created a draft pull request #22 to resolve this with some improvements to Readme.md