iOS Facebook SDK Error Domain com.facebook.sdk Code 2 and Code 7

Question

I am developing the application which allow user to login via Facebook (using Facebook SDK for it). The error appears when a user has already logged in Facebook in iPhone se

Answer 1

Check that you pasted in the Facebook XML into your Info.plist correctly! (as seen here)

CFBundleURLTypes

  
    CFBundleURLSchemes
    
      fb{your-app-id}
    
  

FacebookAppID
{your-app-id}
FacebookDisplayName
{your-app-name}
LSApplicationQueriesSchemes

  fbapi
  fb-messenger-api
  fbauth2
  fbshareextension
 

I forgot to omit the curly brackets, and instead replaced the inner text, yielding the error this post references. Make sure you replace the "{your-app-id}" entirely!