Steam Authentication Not Working

After logging into Steam and redirecting to my WordPress site, I’m presented with the following error. The error is still present after disabling and removing all plugins and switching to the TwentyTwelve theme.

I have already followed this thread without any luck:
http://ww.wp.xz.cn/support/topic/wordpress-social-log-in-not-working-on-my-website?replies=13

Does anyone have any suggestions?

Warning: strpos() [function.strpos]: Offset not contained in string in /home/sbrown78/public_html/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php on line 87

Warning: Cannot modify header information – headers already sent by (output started at /home/sbrown78/public_html/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php:87) in /home/sbrown78/public_html/wp-includes/pluggable.php on line 680

Warning: Cannot modify header information – headers already sent by (output started at /home/sbrown78/public_html/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php:87) in /home/sbrown78/public_html/wp-includes/pluggable.php on line 681

Warning: Cannot modify header information – headers already sent by (output started at /home/sbrown78/public_html/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php:87) in /home/sbrown78/public_html/wp-includes/pluggable.php on line 682

Warning: Cannot modify header information – headers already sent by (output started at /home/sbrown78/public_html/wp-content/plugins/wordpress-social-login/hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php:87) in /home/sbrown78/public_html/wp-includes/pluggable.php on line 876

http://ww.wp.xz.cn/extend/plugins/wordpress-social-login/