FB login not working on iOS after upgrade to FB SDK 14.1.0

Question

We are using Unity 2019.4.15f1.After upgrading to FB SDK 14.1.0 when clicking on login with facebook button the iOS app is freezing and crashing.

Original: I can see this in the logs:

Sep 21 15:29:21 iPhone MyProject(UnityFramework)[15154] <Notice>: Uncaught exception: 

InvalidOperationException: fb0 is not registered as a URL scheme. Please add it in your Info.plist
(
   0   CoreFoundation                      0x000000019076529c 6B22DD81-3585-3BE6-BC77-BA19810EC0F2 + 627356
   1   libobjc.A.dylib                     0x00000001a9495744 objc_exception_throw + 60
   2   FBSDKCoreKit                        0x00000001056dd3bc -[FBSDKInternalUtility validateFacebookReservedURLSchemes] + 0
   3   FBSDKLoginKit                       0x0000000105a99624 $s13FBSDKLoginKit12LoginManagerC15logInParameters13configuration12loggingToken20authenticationMethodSDyS2SGSgAA0C13ConfigurationCSg_SSSgSStF + 372
   4   FBSDKLoginKit                       0x0000000105a97544 $s13FBSDKLoginKit12LoginManagerC19performBrowserLogIn33_C218275A97333B874EDDFE627110566CLL7handleryySb_s5Error_pSgtcSg_tF + 1216
   5   FBSDKLoginKit                       0x0000000105aa1b00 $s13FBSDKLoginKit12LoginManagerC5logIn33_C218275A97333B874EDDFE627110566CLL11permissions7handleryShyAA12FBPermissionCG_yAA0cdC6Resul

This is what we have in our info.plist file.

<key>CFBundleURLTypes</key>
<array>
   <dict>
      <key>CFBundleURLSchemes</key>
      <array>
         <string>fb***************</string>
      </array>
   </dict>
</array>

We have this LSApplicationQueriesSchemes in our info.plist file too:

<key>LSApplicationQueriesSchemes</key>
    <array>
      <string>fbapi</string>
      <string>fbapi20130214</string>
      <string>fbapi20130410</string>
      <string>fbapi20130702</string>
      <string>fbapi20131010</string>
      <string>fbapi20131219</string>
      <string>fbapi20140410</string>
      <string>fbapi20140116</string>
      <string>fbapi20150313</string>
      <string>fbapi20150629</string>
      <string>fbapi20160328</string>
      <string>fbauth</string>
      <string>fbauth2</string>
      <string>fb-messenger-api20140430</string>
    </array>

UPDATE: After adding fb0 to CFBundleURLSchemes like this:

<key>CFBundleURLTypes</key>
<array>
   <dict>
      <key>CFBundleURLSchemes</key>
      <array>
         <string>fb0</string>
         <string>fb***************</string>
      </array>
   </dict>
</array>

The app isn't crashing anymore, however it shows "Sorry, something went wrong" webpage from Facebook.

Resolution :

I finally found out that after updating the FB SDK, the FacebookSettings.asset file got corrupted and all the app IDs were gone.

I had to fix that by re-copying the FacebookSettings.asset file and adding the app IDs again.

And I removed the fb0 entry from CFBundleURLSchemes as it was clearly not needed and is a default value inside the FB SDK itself.

I am updating it here so that if someone else faces this problem it might help them.

Answer 1

Resolution :

I finally found out that after updating the FB SDK, the FacebookSettings.asset file got corrupted and all the app IDs were gone.

I had to fix that by re-copying the FacebookSettings.asset file and adding the app IDs again.

And I removed the fb0 entry from CFBundleURLSchemes as it was clearly not needed and is a default value inside the FB SDK itself.

I am updating it here so that if someone else faces this problem it might help them.