Not authorized error in pidgin-reg

[khalandar 1602]

Respected sir/mam,
       Hi i am Khalandar, i had installed PIDGIN 2.10.12 version on my
Ubuntu 16.04 machine, but i cant able to chat by using Pidgin it
showing as *khalandar1602 at gmail.com/Home
<http://khalandar1602@gmail.com/Home> Disabled*   *Not Authorized, *i had
tried in many ways by referring Google but i haven't find the solution. So
i kindly request you to send me solution for my issue as soon as possible.
Please send me the details in details.  I had enclosed the screen shot of
the error page please consider it and send me the solution as much as
possible

-- 

Thanks,
KHALANDAR R.
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