I believe this one should work: https://neosmarteconomy.slack.com/join/shared_invite/MjIyOTc2OTU4NDk3LTE1MDIxNzE2NTctZTE1Mjg5ZWE3Yw

You can find many, many useful and verified NEO links at the official NEO Reddit (all located on the right hand side when not on mobile phone): https://www.reddit.com/r/NEO/