Klaus AusderKasse (old) is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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For some reason Tusky isn't accepting octodon.social as an instance... 🙁
@HufflepuffBR strange, I use Tusky with octodon.social.
Did you try to include the https:// ?
@Klaus_AusderKasse Tried it... Didn't worked... Now I'm using 11t