Hello,
i have an interresting problem, i have setup a yeelink.light.color1, when i add the Colorpicker in the sitemap, i cant open this frame where this Colorpicker is added, it was working for a long time 
Thing:
Thing miio:basic:02BE12F7 "Yeelight LED Bulb 01" [ host="192.168.1.1", token="...", deviceId="02BE12F7",model="yeelink.light.color1" ]
Item:
Color YeelightRGB_Color_Wohnzimmer_Lampe2 "Lampe Wohnzimmer Farbe oben" (GF_Living, Lights, Lampewohzimmercolor) {channel="miio:basic:05E0C2CC:rgbColor"}
Sitemap:
Colorpicker item=YeelightRGB_Color_Wohnzimmer_Lampe2 label="Farbe oben" visibility=[YeelightRGB_Ceilling_Wohnzimmer_Lampe==ON]
What can be the problem?