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Joining the org is not an option on that page, only follow button is visible.

The only thing I did was join github... then insert url: https://github.com/orgs/calibrae-project/people... then your avatar was displayed and I then clicked on "follow".
Simple step, I hope it helps you - as I am new to all this so I have no explanation of how this functions.

Follow option is for Loki Verloren, there is no option to join org visible.

@slavix true there is no option to join.
After you clicked follow, next insert this url:
https://github.com/calibrae-project/
and wait for Loki to send you the invite - the invitation will show up top then clicick that and accept the invite.

Ya know, I'd hoped it was a bit more facile than this, but hey, that's github for you...

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