"Error: Unexpected Response" When Attempting to Install 6.3 Snapshot

[filip-sakel]

When attempting to install the 6.3 snapshot, I get the following error:

$ swiftly install 6.3-snapshot
Fetching the latest 6.3 development branch snapshot...
Error: Unexpected response, expected status code: ok, response: undocumented(statusCode: 404, OpenAPIRuntime.UndocumentedPayload(headerFields: [(field: Server: Apple, next: 65535), (field: Date: Tue, 27 Jan 2026 15:11:38 GMT, next: 65535), (field: Content-Type: text/html, next: 65535), (field: Content-Length: 146, next: 65535), (field: Strict-Transport-Security: max-age=31536000; includeSubdomains, next: 65535), (field: X-Frame-Options: SAMEORIGIN, next: 65535), (field: X-XSS-Protection: 1; mode=block, next: 65535), (field: Age: 0, next: 65535), (field: Via: https/1.1 usnyc3-edge-mx-015.ts.apple.com (acdn/3.16363), https/1.1 usnyc3-edge-fx-022.ts.apple.com (acdn/295.16414), next: 65535), (field: X-Cache: miss, miss, next: 65535), (field: CDNUUID: 4236e84f-8239-4115-a294-9d595271f3f0-9419130942, next: 65535), (field: Connection: keep-alive, next: 65535)], body: Optional(OpenAPIRuntime.HTTPBody)))

Other installations work properly. I'm using swiftly 1.1.1 and running Fedora 43 on aarch64:

$ swiftly --version
1.1.1
$ uname -r
6.17.12-400.asahi.fc43.aarch64+16k

Also, here's swiftly's config.json:

{
  "version" : "1.1.1",
  "platform" : {
    "name" : "fedora39",
    "nameFull" : "fedora39",
    "namePretty" : "Fedora Linux 39"
  },
  "inUse" : "6.2.3",
  "installedToolchains" : [
    "main-snapshot-2025-04-12",
    "6.2.3"
  ]
}

[angelobartolome]

Same issue here