Teleport tether crash issue

[Sythen]

Good afternoon all, whenever i try to spawn or craft a teleport tether, it crashs my client and displays the message "disconnected by server" "internal server error"

Anyone got any idea whats going wrong, or what ive done wrong?

thanks

[johnny walker]

Tethers seem to be broken in many ways in 3.0.4, though this particular error is new to me.

Use world anchors instead, same thing but they actually work.

[Gizmo]

I'm using 3.0.4 and tekkit client.

I get a crash as soon as I try to craft the tether but also the miningwell from buildcraft...

edit : "Connection Lost

Internal exception: java.lang.NullPointerException"