Yahoo Fatal Error

Hi, i using the plugin for unique login to my users, but, the Yahoo API return this error:

Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /www/wwwroot/associado.apcf.org.br/wp-content/plugins/miniorange-login-openid/social_apps/mo_openid_configured_apps_funct.php:122 Stack trace: #0 /www/wwwroot/associado.apcf.org.br/wp-content/plugins/miniorange-login-openid/social_apps/yahoo.php(41): mo_openid_get_access_token() #1 /www/wwwroot/associado.apcf.org.br/wp-content/plugins/miniorange-login-openid/mo-openid-social-login-functions.php(97): mo_yahoo->mo_openid_get_access_token() #2 /www/wwwroot/associado.apcf.org.br/wp-content/plugins/miniorange-login-openid/class-mo-openid-login-widget.php(1631): mo_openid_process_custom_app_callback() #3 /www/wwwroot/associado.apcf.org.br/wp-includes/class-wp-hook.php(303): mo_openid_login_validate() #4 /www/wwwroot/associado.apcf.org.br/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters() #5 /www/wwwroot/associado.apcf.org.br/wp-includes/plugin.php(470): WP_Hook->do_action() #6 /www/wwwroot/associado.apcf.org.br/wp-settings.php(578): do_action( in /www/wwwroot/associado.apcf.org.br/wp-content/plugins/miniorange-login-openid/social_apps/mo_openid_configured_apps_funct.php on line 122

I need help, please. Thank`s