Telegram: actions cannot be null

I’m using the Telegram binding for over a year now, but I’m still having a issue with 1 rule. Sometimes it works, sometimes it doesn’t. Mostly not.

val telegramAction = getActions("telegram","telegram:telegramBot:Telegram_Bot")

rule "Send Wasmachine / Droger is finished notification"
when
    //Item Droger_Status changed to 3 or
    Item Wasmachine_Status changed to 3 or
    Item Vaatwasser_Status changed to 3
    
then
    var name = transform("MAP", "witgoed.map", triggeringItem.name)
    var status = transform("MAP", "witgoed.map", triggeringItem.state.toString)
    
    logInfo("Wasmachine / droger klaar", "De " + name + " is " + status + ".")

    var String message = "De " + name + " is " + status + "."
        logInfo("Wasmachine / droger klaar", message)
        telegramAction.sendTelegram(message)
end

When it doesn’t work this results in:

2021-01-31 14:10:58.137 [vent.ItemStateChangedEvent] - Wasmachine_Status changed from 2 to 3

==> /var/log/openhab2/openhab.log <==
2021-01-31 14:10:58.138 [INFO ] [del.script.Wasmachine / droger klaar] - De wasmachine is klaar.
2021-01-31 14:10:58.139 [INFO ] [del.script.Wasmachine / droger klaar] - De wasmachine is klaar.
2021-01-31 14:10:58.139 [ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Send Wasmachine / Droger is finished notification': actions cannot be null

This proofs that the string is created as it should, but somehow Telegram cannot send it?

Telegram-actions is NOT installed
binding-telegram - 2.5.12 is installed

Who can help me?

I found the solution in the speedtest topic:

telegramAction.sendTelegram(message.toString)