I am running an Arm64-v8 build of Tranquil PDS (I built it myself due to the lack of an official arm64-v8 build option, the source code is unchanged) and am unable to register for an account.
I have set up a basic config with no SSO options, and while the server appears to be set up correctly as my reverse proxy routes just fine, clicking on the Register button shows a completely blank page and an error in the console, reading Failed to ensure OAuth request URI: Error: client_id in metadata does not match request. The Login page is also blank, but the same Failed to ensure OAuth request URI: Error: client_id in metadata does not match request is shown in the form of many toast notifications in the top-right, followed by Too many requests. Please try again., which implies that it is retrying continuously.
I have published by docker-compose.yml and config.toml. A (redacted) .env file is here for the sake of posterity.
To clarify, removing the OIDC environment variables and config options changes nothing and the result is the same.