X_ERROR_REPORTER_DSN_INVALID
Means
the error monitor DSN is malformed
Typical cause
SENTRY_DSN is not a URL, carries no public key, names no project, or uses a scheme that is not http/https. Thrown at boot rather than at the first failure, because a monitor that was never connected looks exactly like an app that never failed
Fix
set SENTRY_DSN=https://<publicKey>@<host>/<projectId> in .env, then run x env check