More logs to explain the intermittent issue. These two calls are between 3 seconds. daramfon@MacBook-Pro-4 MomentsHub % curl -v https://app-site-association.cdn-apple.com/a/v1/yourmomentshub.com * Host app-site-association.cdn-apple.com:443 was resolved. * IPv6: (none) * IPv4: 17.253.27.203, 17.253.13.135, 17.253.7.146, 17.253.97.202, 17.253.7.154, 17.253.13.137, 17.253.97.205, 17.253.27.198 * Trying 17.253.27.203:443... * Connected to app-site-association.cdn-apple.com (17.253.27.203) port 443 * ALPN: curl offers h2,http/1.1 * (304) (OUT), TLS handshake, Client hello (1): * CAfile: /etc/ssl/cert.pem * CApath: none * (304) (IN), TLS handshake, Server hello (2): * (304) (IN), TLS handshake, Unknown (8): * (304) (IN), TLS handshake, Certificate (11): * (304) (IN), TLS handshake, CERT verify (15): * (304) (IN), TLS handshake, Finished (20): * (304) (OUT), TLS handshake, Finished (20): * SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 / [blank] / UNDEF * ALPN: server accepted http/1.1 * Server certificate: * subject: C=US; ST=California; O=Apple Inc.; CN=app-site-association.cdn-apple.com * start date: Jul 16 18:07:31 2024 GMT * expire date: Oct 14 18:17:31 2024 GMT * subjectAltName: host "app-site-association.cdn-apple.com" matched cert's "app-site-association.cdn-apple.com" * issuer: CN=Apple Public Server ECC CA 12 - G1; O=Apple Inc.; ST=California; C=US * SSL certificate verify ok. * using HTTP/1.x > GET /a/v1/yourmomentshub.com HTTP/1.1 > Host: app-site-association.cdn-apple.com > User-Agent: curl/8.6.0 > Accept: */* > < HTTP/1.1 404 Not Found < Apple-Failure-Details: {"cause":"read tcp 172.31.150.237:46444-\u003e198.12.247.28:443: read: connection reset by peer"} < Apple-Failure-Reason: SWCERR00305 Network error < Apple-From: https://yourmomentshub.com/.well-known/apple-app-site-association < Apple-Try-Direct: false < Cache-Control: max-age=3600,public < Content-Length: 10 < Content-Type: text/plain; charset=utf-8 < Date: Tue, 23 Jul 2024 17:09:02 GMT < Age: 727 < Via: https/1.1 uschi7-3p-pst-006.ts.apple.com (acdn/252.14441), http/1.1 uschi7-3p-pac-006.ts.apple.com (acdn/252.14441), https/1.1 uschi7-3p-pfe-001.ts.apple.com (acdn/252.14441), http/1.1 uschi5-edge-lx-001.ts.apple.com (acdn/252.14441), https/1.1 uschi5-edge-bx-021.ts.apple.com (acdn/252.14441) < X-Cache: hit-stale, hit-fresh, miss, hit-fresh, hit-stale < CDNUUID: d962cde9-ed20-4314-801f-9fa2396a5e8a-2171469140 < Expires: Tue, 23 Jul 2024 17:09:12 GMT < Connection: keep-alive < Not Found * Connection #0 to host app-site-association.cdn-apple.com left intact daramfon@MacBook-Pro-4 MomentsHub % curl -v https://app-site-association.cdn-apple.com/a/v1/yourmomentshub.com * Host app-site-association.cdn-apple.com:443 was resolved. * IPv6: (none) * IPv4: 17.253.97.202, 17.253.13.135, 17.253.7.146, 17.253.97.205, 17.253.13.137, 17.253.7.154, 17.253.27.203, 17.253.27.198 * Trying 17.253.97.202:443... * Connected to app-site-association.cdn-apple.com (17.253.97.202) port 443 * ALPN: curl offers h2,http/1.1 * (304) (OUT), TLS handshake, Client hello (1): * CAfile: /etc/ssl/cert.pem * CApath: none * (304) (IN), TLS handshake, Server hello (2): * (304) (IN), TLS handshake, Unknown (8): * (304) (IN), TLS handshake, Certificate (11): * (304) (IN), TLS handshake, CERT verify (15): * (304) (IN), TLS handshake, Finished (20): * (304) (OUT), TLS handshake, Finished (20): * SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 / [blank] / UNDEF * ALPN: server accepted http/1.1 * Server certificate: * subject: C=US; ST=California; O=Apple Inc.; CN=app-site-association.cdn-apple.com * start date: Jul 16 18:07:31 2024 GMT * expire date: Oct 14 18:17:31 2024 GMT * subjectAltName: host "app-site-association.cdn-apple.com" matched cert's "app-site-association.cdn-apple.com" * issuer: CN=Apple Public Server ECC CA 12 - G1; O=Apple Inc.; ST=California; C=US * SSL certificate verify ok. * using HTTP/1.x > GET /a/v1/yourmomentshub.com HTTP/1.1 > Host: app-site-association.cdn-apple.com > User-Agent: curl/8.6.0 > Accept: */* > < HTTP/1.1 200 OK < Apple-From: https://yourmomentshub.com/.well-known/apple-app-site-association < Apple-Origin-Format: json < Cache-Control: max-age=21600,public < Content-Length: 861 < Content-Type: application/json < Date: Tue, 23 Jul 2024 16:19:23 GMT < Age: 3708 < Via: https/1.1 usqas4-vp-vst-002.ts.apple.com (acdn/252.14441), https/1.1 usqas4-vp-vfe-006.ts.apple.com (acdn/252.14441), http/1.1 usewr1-edge-lx-011.ts.apple.com (acdn/252.14441), http/1.1 usewr1-edge-bx-006.ts.apple.com (acdn/252.14441) < X-Cache: hit-stale, miss, hit-fresh, hit-fresh < CDNUUID: 80ba6fd1-82da-403f-bbc1-aa99da486fac-14511833217 < Connection: keep-alive < { "applinks": { "details": [ { "appIDs": [ "9BEUBEN9L7.com.daramfon.MomentsHub" ], "components": [ { "/": "/moments/*", "comment": "Matches any URL with a path that starts with /moments/." }, { "/": "/polls/*", "comment": "Matches any URL with a path that starts with /polls/." }, { "/": "/profile/*", "comment": "Matches any URL with a path that starts with /profile/." }, { "/": "/verified/*", "comment": "Matches any URL with a path that starts with /verified/." } ] } ] }, "webcredentials": { "apps": [ "9BEUBEN9L7.com.daramfon.MomentsHub" ] }, "appclips": { "apps": [ "9BEUBEN9L7.com.daramfon.MomentsHub.Clip" ] } } * Connection #0 to host app-site-association.cdn-apple.com left intact

Hello @DTS Engineer , I still run into the same issue. I also checked my server settings to ensure that it accepts all browser requests and traffic from user-agents curl -I -A "AASA-Bot/1.0" https://yourmomentshub.com/.well-known/apple-app-site-association. I am not quite sure what the issue could be anymore. I did some surfing and learned that maybe I need to switch the AASA file to the newer format and I did that as well. I have gone through all the steps in the tech note and I think I have exhausted all my options at this point. My application is heavily dependent on universal linking, any guidance will be appreciated. Thank you!

Does anyone have a solution to this problem? I am experiencing the same issue