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The secret was correct. The first byte wasn't.

Our deploy tool pushed a fresh API token to production. It reported success. The token was correct. Every request then failed with this: Cannot convert argument to a ByteString because the character…

Point the official Sentry SDK at self-hosted ingest (DSN only)

You don’t need a forked Sentry SDK. Keep @sentry/browser or @sentry/node , change only dsn , then prove /health → HTTP 202 → Issues.

  • Clone the public repo and run Docker Compose to set up self-hosted ingest.
  • Install pinned official Sentry SDK (7.120.0) with custom DSN and settings.
  • Verify SDK ingestion by capturing an exception and checking for 202 response.

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