New bedrock players can't join my crossplay server.

I have a crossplay server that i made yesterday. My friends were able to join yesterday, but now my friend can't join. Every time they try to join it says invalid ip address with the regular ip and DYNip, and we've tried flushing their DNS cache on their phone. Can someone please help.

I forgot to add but I've even tried to get on through my phone and I get the same problem as well. I also tried flushing my Dns cache too. This is only happening to new bedrock players.

Nevermind i figured it out!