Rake uploads:migrate_to_s3 fails because DISCOURSE_S3_CDN_URL env var is empty

I think there’s an issue with how Discourse handles this. When you move uploads to S3 and set the DISCOURSE_S3_CDN_URL env variable, Discourse tries to fetch assets from S3 too. I had to move uploads and assets to S3 + Cloudfront to make it work, but it shouldn’t be needed since you only want uploads to be on S3

You can check this thread to see if it helps.

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