Can’t install new plugin via config-ui-x
I wondering if installing plug ins via the Config-UI-X interface is not possible? If I try to install a plugin via the web interface I get the following error message:

![4be38a3d-f2cc-4d6b-af78-f72356533afe](https://user-images.githubusercontent.com/25128243/35831966-5bb58054-0a80-11e8-882f-6a32042d3bba.jpeg)

Installing plugins via the terminal (yarn) works. Would love to be able to install plugins right from the web GUI, though!