I had 26.5 IOTA in this wallet but now shows 0 . Why?

https://explorer.iota.org/mainnet/address/DUOWARVXRNBJGQJI9GPQTJAGTCDTP9ECMQRVYSI9ALWIV9TPKYPMISYEBVXFJYGKZOHVQU9TOYWTSSUTDNRCZNGOTW