Apparently, "zandy" has left project 7 entirely, including the discord, so I doubt that they still have a invite, especially since the permanent one has gone invalid. The new owner has also announced that project 7 would be going private, so if you wanted to get it, you might not be able to anymore.
edit:
project seven is completely private. i know i've said in other topics that zandy would give links, but they have said multiple times that they do not give links. zandy will not give links, and i can't without being banned.