NullPointerException affter successful login from Provider

[Ravindra Godbole]

I am deploying demo application [socialauth-demo]  as-is on Google App Engine and got this error after successful login from Provider.[facebook]

1. W2014-02-10 09:26:52.485 /authSuccess.do java.lang.NullPointerException at com.threepillar.labs.socialauthsample.controller.SuccessController.registration(SuccessController.j

2. C2014-02-10 09:26:52.487 Uncaught exception from servlet java.lang.NullPointerException at com.threepillar.labs.socialauthsample.controller.SuccessController.registration(Suc...

Looks like provider is null and hence this issue. Not sure why this is happening.

Before this I was getting Serialization related exception on SocialAuthTemplate of spring which I got rid of after making changes to spring module and building it locally [ SocialAuthTemplate implements Serializable ]

Has anybody seen similar error and any solution around the same ?

- Ravi

[Ravindra Godbole]

Finally I found out that it was the typo.

Please ensure that you do not have / in the redirect URL 

I had following

http://my.bank.com/

I changed it to following and everything started working.

http://my.bank.com

-Ravi