openHAB 4.0 SNAPSHOT discussion

Have some issues since yesterday with IPCAMERA binding

sending a picture if someone rings on door

rule "Haustuer Foto"
when
   Item Haustuer_Klingel changed to ON
then
	{val telegramAction = getActions("telegram","telegram:telegramBot:Telegram_Bot")
	telegramAction.sendTelegramPhoto("http://192.168.1.12:8080/ipcamera/192168493/ipcamera.jpg", "Haustür")
	Haustuer_Klingel.sendCommand(OFF)}
end

Haustür:Download failed with status 500
calling the URL from browser result:

HTTP ERROR 500 java.lang.IllegalStateException: !asyncSupported: NotAsync:org.ops4j.pax.web.service.spi.servlet.OsgiInitializedServlet@536b0858
URI:	/ipcamera/192168493/ipcamera.jpg
STATUS:	500
MESSAGE:	java.lang.IllegalStateException: !asyncSupported: NotAsync:org.ops4j.pax.web.service.spi.servlet.OsgiInitializedServlet@536b0858
SERVLET:	org.openhab.binding.ipcamera.internal.servlet.CameraServlet
CAUSED BY:	java.lang.IllegalStateException: !asyncSupported: NotAsync:org.ops4j.pax.web.service.spi.servlet.OsgiInitializedServlet@536b0858
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not sure if it is related but happens since upgrade yesterday
thanks
Thomas