Dina Manzo was noticeably absent from Lauren Manzo’s engagement party. The reason for her non-invitation is not mentioned in the given content.
Lauren Manzo addressed a fan on Twitter and provided her reasons for not inviting Teresa Giudice to her engagement party. However, the specific reasons are not mentioned in the given content.
The given content mentions that Lauren Manzo invited some members of the RHONJ cast to her engagement party. However, it does not specify who she should have invited or who she did invite.