Thanks for the post, when requesting the AASA file from your server:
curl -v https://iyb-cityapp1.sjdit.com/.well-known/apple-app-site-association
Results:
* Host iyb-cityapp1.sjdit.com:443 was resolved.
* IPv6: (none)
* IPv4: 117.139.108.128, 218.6.151.154
* Trying 117.139.108.128:443...
* connect to 117.139.108.128 port 443 from 17.198.137.220 port 54735 failed: Operation timed out
* Trying 218.6.151.154:443...
* connect to 218.6.151.154 port 443 from 17.198.137.220 port 54746 failed: Operation timed out
* Failed to connect to iyb-cityapp1.sjdit.com port 443 after 150006 ms: Couldn't connect to server
* Closing connection
curl: (28) Failed to connect to iyb-cityapp1.sjdit.com port 443 after 150006 ms: Couldn't connect to server
I do not get the AASA file back. Please make sure to add the AASA file into that location, then go over the guide to make sure all the steps are followed:
https://developer.apple.com/documentation/technotes/tn3155-debugging-universal-links
Albert Pascual
Worldwide Developer Relations.