Hi, 1.I want to add one more subscription link in course details page for new user subscription please help me how can i add that link ,i know the hook location but i don't know the location of subscription link where it can be located? 2.when login i'm getting below error please help me.after login the url like this http://192.168.1.98/testsite/user/login EntityMetadataWrapperException: Unknown data property og_user_node. in EntityStructureWrapper->getPropertyInfo() (line 335 of /var/www/html/test/testsite/profiles/opigno_lms/modules/contrib/entity/includes/entity.wrapper.inc). I hope you get quick replay. Thanks in Advance.