I'm pretty sure that it means: invalid lightning address.
Do you have one? Get a lightning wallet (e.g. phoenix, wallet of satoshi, zap, blue, muun).
Discussion
Yeah Ok what threw me was that the client indicated that what I entered was fine by not throwing an error and showed the little lightning option in my profile but when someone tried to send a payment it gave that error. From their side and my side everything looked good. What I entered must have been the right format but still an invalid wallet thanks.