Results 5 comments of yellowwinner

Java(TM) SE Runtime Environment (build 1.8.0_161-b12) Windows 10 with hacks enabled. Updating doesn't solve the issue. @kcxx

If possible, adding a actual heartbeat.jsp would solve the issue RetroCraft had where custom servers couldn't be used.

@MisterSheeple I was just saying if possible it would be good. Without a Heartbeat we can't use custom server softwares. Also Mojang still doesn't have Auth servers for Classic meaning...

Please give more information including OS, Java version, etc. Versions before 0.27 are not supported as well.