Can't read from file

I am getting the "Can't read from file" error. I see a couple of other related issues, but I am not sure how to further debug this. My specs are available with a quick response time via a direct request from curl or my browser, but the validator can't access them. I have a strong suspicion that it is some setting on Cloudflare that is maybe blocking the validator.

Is there a way to get any more debug information about what the validator sees when it makes the request for my specs? (What HTTP error code does it get, etc?)

Does the validator service make the requests from one or more fixed IP addresses that I can add to my Cloudflare allowlist?

Spec 1:

• https://filterlists.com/api/directory/v1/swagger.json
• https://validator.swagger.io/validator/debug?url=https%3A%2F%2Ffilterlists.com%2Fapi%2Fdirectory%2Fv1%2Fswagger.json

Spec 2:

• https://filterlists.com/api/archival/v1/swagger.json
• https://validator.swagger.io/validator/debug?url=https%3A%2F%2Ffilterlists.com%2Fapi%2Fdirectory%2Fv1%2Fswagger.json

Possibly related:

• #57
• #87

Start with the validator/debug endpoint and reproduce both filterlists.com specification requests, comparing direct browser or curl access with validator access. Review related issues #57 and #87; the work is complete when the validator's HTTP failure details and request source or allowlisting guidance are exposed or clearly documented.