Add this code in appearance> customize >> custom css
#vibebp_member .profile_grid .wplms_manage_courses_wrapper .vibebp_form_field {
border-bottom:2px solid #825527 !important;
border-left:0px !important;
border-right:0px !important;
border-top:0px !important;
}
#vibebp_member .vibebp_myprofile select{
border-bottom:2px solid #825527 !important;
border-left:0px !important;
border-right:0px !important;
border-top:0px !important;
}
#vibebp_member .profile_grid .wplms_manage_courses_wrapper span{
border:0px !important;
}