I cant open iOS app via a https url, what is wrong with my configuration/setup?

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Created Jul ’21

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I am developing an app with xamarin. And i cant get the iOS app to open via a link in safari or in email. Can someone tell me what i am possibly doing wrong?

I get the error message:

Filter in the devicelog on 'swcd' gives me the following error: Time Device Name Type PID Tag Message Jul 26 16:26:00 iPad-van-Nick Error 233 swcd Error getting enterprise-managed associated domains data. If this device is not enterprise-managed, this is normal: Error Domain=SWCErrorDomain Code=1701 "Failed to get associated domain data from ManagedConfiguration framework." UserInfo={NSDebugDescription=Failed to get associated domain data from ManagedConfiguration framework., Line=298, Function=<private>}

I am using:

Visual studio 2019 (updated) on windows
- I have enabled auto provisioning
Renting a mac via macincloud for compiling the sources (bigSur)
Testing on a iPad what the latest iOS14
Using sdk 14.5

In the Entitlements.plist I've added:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>keychain-access-groups</key>
	<array>
		<string>$(AppIdentifierPrefix)com.redacted.redacted</string>
	</array>
	<key>com.apple.developer.networking.wifi-info</key>
	<true/>
	<key>com.apple.developer.associated-domains</key>
	<array>
		<string>applinks:mydomain.nl</string>
		<string>applinks:*.mydomain.nl</string>
	</array>
</dict>
</plist>

Also for the associated domains I've tried to specify only the subdomain i want to use.

Where mydomain is a valid domain of course. I have tried ?mode=developer, but my domain is publicly accessible so this should not be needed. Also i can't put my iPad to developer mode, because i am on windows.

On the websever I've added a .well-know folder with the apple-app-site-association with the following: (Also had the file in the root folder, or both)

{
	"applinks": {
		"apps": [],
		"details": [{
			"appID": "redacted.com.redacted.redacted",
			"components": [

				{
					"/": "/verify_email/*",
					"comment": "Matches any URL whose path starts with /verify_email/"
				}
			],
			"paths": [
				"/verify_email/*"
			]
		}]
	}
}

(I've tried different variants for the file, with components, with paths, both in the same file)

"components" for iOS 14 and up "paths" for devices prior to iOS 14

The https://branch.io/resources/aasa-validator/ validates all successfully:

Your domain is valid (valid DNS).
Your file is served over HTTPS.
Your server does not return error status codes greater than 400.
Your file's 'content-type' header was found :)
Your JSON is validated.

If i validate my domain via: https://search.developer.apple.com/appsearch-validation-tool

Then i get this message: Link to Application Action required Could not extract required information for application links. Learn how to implement the recommended Universal Links. Error no apps associated with url

I think this is because the app is not yet in the appstore and being developed?

Also when i look at the identifiers details page for my app I see 'associated domains' enabled.

I have the feeling that i am missing something. Enabling 'URL types' works like a charm. But i don't like to use urls like myapp://mydomain.nl/verify_email/abcd

Thanks in advance!

Nick

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