My computer doesn't let me join a Minecraft server, why?

Alloa,
I have the problem that I can't join to a certain server, why, i don't know._.
Tried another computer that runs on a different network, worked with the…

Have already tried a few things such as deactivating the firewall and Defender, do not know what to do next.
It is also not shown in the console that I'm trying to connect to the server…

Where is the problem?

Edit: My problem has been solved! : 3
For people who have the problem themselves, just wait a few days and it will work again!

Try to join with a port

Can only with port join what is not possible… _.

What does it say if you want to join?

The same thing happened to me

You may have 1.16 on it but the servers are only until 1.15

Maybe outdated server and you have to change the version

What do you mean exactly?
This is a bungee server that runs on 1.15.2, which I also try to join.

Isn bug

Isn't that so I'm trying to join this server with a wrong version. : 3
Optifine only goes until 1.15.2, don't think it could be because of it… -.

So is it a bug of Bungeecord that only this computer can't join the server? _.

Alloa, it works for me again! : 3
How I solved it:
Just wait, after a few days I came back…