Telegram Plugin doesn't works

Recently I’ve install Graylog 3.1 and this Telegram Plugin (

The plugin starts with graylog, and I can configure the notification, but when I try to send a message, I receive this message:

``` Caused by: Couldn't send legacy notification - legacy notifications cannot be retried!
at ~[graylog.jar:?]

at ~[graylog.jar:?]

… 11 more

Caused by: java.lang.NullPointerException

at de.sandstorm_projects.telegramAlert.TelegramBot.sendMessage( ~[?:?]

at ~[?:?]

at ~[graylog.jar:?]

at ~[graylog.jar:?]

at ~[graylog.jar:?]

… 11 more`

Any Ideas?

the Plugin creator might need to adjust that plugin for the Graylog Version.