The original poster, Noah, is having trouble removing associated accounts from their Discourse site. cocococosti confirms that this feature has been available since 2019, and provides a link to the relevant code.
After some troubleshooting, pfaffman suggests that a misconfigured reverse proxy might be causing the issue, but Noah confirms that this is not the case.
With the latest Discourse update, the error disappears, but Noah still can’t access their associated accounts. david asks about the red wastebasket button, which Noah says doesn’t exist on their main account.
david then points out that Associated Accounts can’t be used alongside two-factor authentication (2FA), which Noah has enabled. To remove the associated accounts, Noah would have to disable 2FA. Alternatively, david provides a Rails console command that can be used to destroy the associated accounts, but this requires admin access and knowledge of the console.