Can’t connect to my server UnlistedSplashYT.aternos.me

My server was working fine a while ago but now it broken first it says I can have up to 20 people but on Minecraft it says 0/1 and when I try to join it just say connection timed out. I’m using apple iPad to do this any help?

Server IP: UnlistedSplashYT.aternos.me

Port: ?

Please help

My software is Vanilla 1.15.2 is this the right one?

I don’t know what that is so I don’t think so no

Ok I’ll try that

do I just try the latest version or because my Minecraft is 1.14.30 and that is not one of the options

yay thx it working now but when I try join it says you are not invited to play on this server

Ok is there a way I can make it so everyone not just friends can join?

Thank you I have got my server working good now except... the spawn when I die instead of going to the spawn I built I goes like of a few locks is that the respawn radius thing or... also is there a spawn protection option in options because sometimes when I go into it there is but now there’s not ?

Thanks

How do I get spawn protection without the mod plugin thing? Is there a way to do that