Cigna's reference files unreachable

[S0V3T]

Hey, the problem is Cigna's urls, which are not reachable, they contain invalid signature or the signature configuration for this type of files is misconfigured on the server.

Here's the example link I've tried:

https://d25kgz5rikkq4n.cloudfront.net/cost_transparency/mrf/prov_reference_file_evicore/reporting_month=2024-07/prov_allcatd_grp_id=1003131/2024-07_1003131.json?Expires=2040422399&Signature=Vh9kEmilzP~Rhgo1jn4rOgJjoFWqPGF-OobEwuhBwuv8e-nAfnk4D4PRVA-dUTpDpZLskefcDCvMp0j4BT0eW71sfEYtpoomZjYqkHXbbVX5W6nG4NWonur5l-J18gcSzr6niTBT5JevMmjenajeiTW6UFi4AQX7~bzmGwgw9G08Vlm1hzyfT4RXvsfRN0xtMpPcJyEnkZ~wofgJGwBdocBSYrWyw6JiiGZy8arDc7z-u~qmDbZX3jSXavyyjtVS67b2KU6HOGGo7buNUTX9WccEa90o~3CIpq4cNjkpk-z0d8WPppF5vTeYbeWVXom9VBvGrp~75f8GCilDwuRJFA__&Key-Pair-Id=K1NVBEPVH9LWJ

The response that I get from the request is:

<Error>
<Code>InvalidKey</Code>
<Message>Unknown Key</Message>
</Error>

[dshimko]

The links from their Table of Contents index file are working as expected. That ToC is from their mrf compliance page: https://www.cigna.com/legal/compliance/machine-readable-files

Where are these reference files listed?