Why iOS13 Login with Facebook Does Not Work

Facebook Login kit with iOS 13 canOpenURL: failed for URL: “fbauth2:///”

Upgrading to the current FBSDK should resolve the problem.

FBSDKCoreKit/FBSDKCoreKit/Internal/BridgeAPI/FBSDKBridgeAPI.m was modified to support iOS 13's requirement to implement ASWebAuthenticationPresentationContextProviding in FBSDKCoreKit 5.4. The current version is 5.8. Versions prior will no longer work.

The needed change is posted here: https://github.com/facebook/facebook-ios-sdk/commit/6b061099f339ef0e8bde2e2c2163ef5a3c1b8340#diff-72593591275d63edfb1bfad837e4c32f

Facebook login failed: fbauth2:/ - error: This app is not allowed to query for scheme fbauth2 iOS 13, Xcode 11

Upgrading to the current FBSDK should resolve the problem. iOS 13 requires the implementation of ASWebAuthenticationPresentationContextProviding, which was not available until FBSDKCoreKit 5.4.

FBSDKCoreKit/FBSDKCoreKit/Internal/BridgeAPI/FBSDKBridgeAPI.m was modified to support iOS 13's requirement to implement ASWebAuthenticationPresentationContextProviding in FBSDKCoreKit 5.4. (The current version is 5.8.) Versions prior will no longer work.

The needed change is posted here: https://github.com/facebook/facebook-ios-sdk/commit/6b061099f339ef0e8bde2e2c2163ef5a3c1b8340#diff-72593591275d63edfb1bfad837e4c32f

I was unable to upgrade due to a dependency with AWS, but I was able to patch the 4.42 version of the file based on the differences in the diff above.

The error -canOpenURL: failed for URL: "fbauth2:/" - error: "This app is not allowed to query for scheme fbauth2 was a symptom of the FBSDK attempting to open Facebook, which was not installed, so it was just a warning before it would fall back to browser-based FB auth.

Facebook login callback not working when using Facebook app - Swift

I think you've done a log in via Facebook and this may cause some problems
It is best to use the latest update for Facebook sdk using pod or download facebook framework latest version

pod 'FacebookCore'
pod 'FacebookLogin'
pod 'FacebookShare'

see facebook LoginBehavior

based on last update for facebook sdk It should appear this way

And check plist info same this

<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>fb{your-app-id}</string>
    </array>
  </dict>
</array>
<key>FacebookAppID</key>
<string>{your-app-id}</string>
<key>FacebookDisplayName</key>
<string>{your-app-name}</string>
<key>LSApplicationQueriesSchemes</key>
<array>
  <string>fbapi</string>
  <string>fb-messenger-share-api</string>
  <string>fbauth2</string>
  <string>fbshareextension</string>
</array>

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