Hey Folks! Maybe someone can point me into the right direction. I have an App which should be opened by the associated domain. I think on the xcode-side I did everything right as I can see the swcd trigger in the console on fresh install. here is the output: Request for '<private>' for task AASA-1C727A71-EAC0-4EF7-8F40-0EB4DBFAAFFF { domain: me….do….de, bytes: 0, route: cdn } denied because the CDN told us to stop with HTTP status 404: SWCERR00305 Network error -- {"cause":"EOF"} Serverside I hosted the apple-app-site-association file in the .well-known directory like so: &#9;"appIDs": [ "69NHXD8TDC.org.natgo.dolspotmeet" ], &#9;"components": [ &#9;&#9;{ &#9;&#9;&#9;"/": "/*", &#9;&#9;&#9;"comment": "Matches any URL" &#9;&#9;} &#9;], &#9;"defaults": { "caseSensitive": false } } When I curl the file its perfectly reachable: curl -v https://meet.dolspot.de/.well-known/apple-app-site-association Output: HTTP/2 200 server: nginx/1.14.0 (Ubuntu) date: Tue, 26 Jan 2021 15:15:56 GMT content-type: application/pkcs7-mime content-length: 183 last-modified: Tue, 26 Jan 2021 15:05:07 GMT etag: "60102fa3-b7" strict-transport-security: max-age=31536000 accept-ranges: bytes { &#9;"appIDs": [ "69NHXD8TDC.org.natgo.dolspotmeet" ], &#9;"components": [ &#9;&#9;{ &#9;&#9;&#9;"/": "/*", &#9;&#9;&#9;"comment": "Matches any URL" &#9;&#9;} &#9;], &#9;"defaults": { "caseSensitive": false } }% As you can see I also already changed the served Application-type to application/pkcs7-mime in the nginx config. I really dont understand why apples crawler wont crawl this. In the server access logs I am not able to see any accesses from the AASA-Bot. Also I deleted any robots.txt in the corresponding directory, so the bot shouldnt be blocked. The Error is reproducable when hitting the following curl: curl -v https://app-site-association.cdn-apple.com/a/v1/meet.dolspot.de Resulting in the following: < HTTP/1.1 404 Not Found < Date: Tue, 26 Jan 2021 15:05:40 GMT < Content-Length: 0 < Apple-Failure-Details: {"cause":"EOF"} < Apple-Failure-Reason: SWCERR00305 Network error < Apple-From: https://meet.dolspot.de/.well-known/apple-app-site-association < Apple-Try-Direct: false < Cache-Control: max-age=1800,public < Age: 825 < Via: https/1.1 uklon5-vp-vst-007.ts.apple.com (ApacheTrafficServer/8.1.0), https/1.1 uklon5-vp-vfe-005.ts.apple.com (ApacheTrafficServer/8.1.1), http/1.1 dedus1-edge-lx-002.ts.apple.com (ApacheTrafficServer/8.1.1), https/1.1 dedus1-edge-bx-002.ts.apple.com (ApacheTrafficServer/8.1.1) < Server: ATS/8.1.1 < CDNUUID: 09a85634-db60-46ba-8a28-5d22021aaf4a-18339802882 < X-Cache: miss, hit-fresh, hit-stale, miss < Expires: Tue, 26 Jan 2021 15:05:50 GMT < Connection: keep-alive < Connection #0 to host app-site-association.cdn-apple.com left intact Closing connection 0 I am pretty much at the end of my troubleshooting-journey and would greatly appreciate any help on this 🙂 Cheers Kian