This is the file directly from S3. Discourse saves these tiny xml files to the S3 bucket for some reason.
The media (images, PDFs, etc) on my Discourse is working well with no issues whatsoever.
EDIT:
Sorry I just realized what you were asking, this is the content of the file:
de8e8e3b4675asd1a459600d7606d06568b10b1e94ea61ec54c36ccef95dcf rsrbt [25/Sep/2020:18:08:42 +0000] 99.124.56.223 de8e8e3b46a459500d760068b15e410b1e94ea61ec54ccef95dcf 0FA4CAA473DCF77B REST.GET.CORS - "GET /rsrbt?cors= HTTP/1.1" 404 NoSuchCORSConfiguration 311 - 33 - "-" "S3Console/0.4, aws-internal/3 aws-sdk-java/1.11.783 Linux/4.9.217-0.1.ac.205.84.332.metal1.x86_64 OpenJDK_64-Bit_Server_VM/25.252-b09 java/1.8.0_252 vendor/Oracle_Corporation" - hQWfzngEbMCWnJf3y1ELQgUAJgUHvslvzl6ZXixF1xZlaT7UUXik2HK8ggU8= SigV4 ECDHE-RSA-AES128-SHA AuthHeader s3.us-east-2.amazonaws.com TLSv1.2