Self-hosted: SSO is failing to setup due to 400 from admin

(#603) Bug Fixed self-hosting

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Comment by @kerichdev
RexSystem 1 vote originally by @kerichdev on GitHub OP
Tip: this has essentially been resolved by manually specifying extra hosts, so I'm keeping the issue open for visibility to add this to docs in the future. If this is already tracked, I will close the issue, or the developers may feel free to do so 🫡