Errors in linkedinlogin

Question

Hello Members,

 

Hope you are doing good!!

 

Here i am trying to use the below artical 

 

https://www.c-sharpcorner.com/article/log-in-with-linkedin-credentials/

 

But facing the below issues, Can any one guide me here.

 

 

 

 

 

Can any one guide me here.

Thank you in advance!!