When I open plugins in the preferences and start searching for a plugin in the repositories I always have such error http://prntscr.com/hyw37m. I thought it is because of installed Material Theme UI, but I deleted it and error didn't disappear. It is pretty annoying and I remarked that when I start searching for a plugin in the repositories IDE shows a lot of plugins(which is correct), but after such error, it shows only a few of them and not that I need at all. Button 'retry' doesn't help.
WebStorm version - 2017.2.5