[wppb-login] is not working

Dear Team,

My website name is http://www.learn4autism.com/ for which the [wppb-login] is not working. The same user is and Password is working through http://www.learn4autism.com/wp-admin, but not working through the [wppb-login] .

Here is one user ID and Password for your referance.
ID:samaresh
PASS:super@123

Regards
Samaresh

https://wordpress.org/plugins/profile-builder/