FTB Infinity /help Crash

[Maxim1592]

Hello ,

I host my own ftb infinity server .
Everytime someone types /help , we all crash and get an error .
Can someone explain me why this is happening ?
Here is the error message : http://halloikbenyosri.site50.net/Error.PNG
Greetings Maxim

 

[Bummins]

Hello.

I have just started the process of updating out server to 1.7.10-1448
and also i found the very basic server causes all clients to crash with an error like this when typing /help or /help 1.

/help 2 works though
tried HelpFixer-1.0.7.jar in the mod list but that doesn't worth either.

Please help, we cant be the only persons with this issue

 

[OreCruncher]

It may be better to post the crash log to pastebin and provide a link to it.