Players don't display and ping is "?"

I created my own server for public, and when I and my friends are joining, we can see those situation(attached in photo)

What should I do?

Yeah, I had this issue last night too setting up a dedicated server (So it’s not the server that’s the issue). What version of the game are you using? Apparently this happens a lot when a new version of BeamNG comes out which can result in various thhings in the game not working right. Like I was having this problem in addition to other players not being replicated right on my end (They’re driving down the West Coast Highway on their stream, but in my game they just drive into a wall and get stuck until they respawn)

Basically either wait out for the new BeamMP version (Sounds like it shouldn’t be too long), or downgrade your BeamNG game until the update.