Announcement mass email in not working on OJS 3.3.x

After upgrading our OJS from 3.1.x to 3.3.0-5, we noticed that the announcement mass email is not working. We checked the files and also noticed that (lib/pkp/classes/mail/ is missing as well.

Is the new version suppose to be missing announcement mass email function?

Hi @lcentrone,
Thanks for your question. Can you please provide a bit more detail about what error you are seeing or what is not working about this feature? When you create an announcement you should see an option to “Send an email about this to all registered users.” Is the problem that you are not seeing this option, or that you are selecting this option but an email is not being sent?
Thank you,
Publishing Support Specialist, PKP