Looks like I must omit all DISCOURSE_S3_* settings to make uploads work. Is there a way to allow both S3 backups and non-S3 uploads to work in Discourse?
Here are my relevant app.yml variables for reference. Currently everything is commented out.
# DISCOURSE_USE_S3: false
# DISCOURSE_S3_REGION: "us-west-000"
# DISCOURSE_S3_INSTALL_CORS_RULE: false
# DISCOURSE_S3_CONFIGURE_TOMBSTONE_POLICY: false
# DISCOURSE_S3_ENDPOINT: https://s3.us-west-000.backblazeb2.com
# DISCOURSE_S3_ACCESS_KEY_ID: <censored>
# DISCOURSE_S3_SECRET_ACCESS_KEY: <censored>
# DISCOURSE_S3_BUCKET: community-backup
# DISCOURSE_S3_BACKUP_BUCKET: community-backup
# DISCOURSE_BACKUP_LOCATION: s3