YahooWeather connexion error

Hi,

I have a situation with the YahooWeather extension. I am starting with openhab2 (never tried openhab).

I have this log error :

2016-10-13 18:13:04.452 [WARN ] [oweather.handler.YahooWeatherHandler] - Error accessing Yahoo weather: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty

My weather.cg
location.homeyahoo.name=montpellier
location.homeyahoo.woeid=612977
location.homeyahoo.provider=Yahoo
location.homeyahoo.language=fr
location.homeyahoo.updateInterval=5

My things :
yahooweather:weather:montpellier [ location=612977 ]

My items :
Group All
Group gMeteo (All)

Number Temperature 	"Outside Temperature"	(gMeteo)	{ channel="yahooweather:weather:montpellier:temperature" }
Number humidity 	"Outside humidity"		(gMeteo)	{ channel="yahooweather:weather:montpellier:humidity" }
Number pressure 	"Outside pressure"		(gMeteo)	{ channel="yahooweather:weather:montpellier:pressure" }