Image Service Selector Widget does not work

[longcui]

Hi All,

I am using the Web AppBuilder 2.8 and the Image Service Widgets(GitHub - Esri/WAB-Image-Services-Widgets: Web AppBuilder widgets for Image Services (WABIS) ).  Recently I just found the image selector widget does not work. The widget always shows  "Zoom in to select images" and can't tick the Enable image selector tickbox, even zoom in/zoom out at different scale levels. The  image service is Landsat8_Views (ImageServer) .  This widget did work well previously

Here is the screen shot

Regards

choilon