Hello, are you able to play on a browser at all? As far as I know, the miniclient is incompatible with chromebooks, from most of the sources I could find. Do you also have flash installed on your chromebook?

Hello, did you activate flash in your browser settings?

The following link will give directions on as to how to do so.

https://support.digication.com/hc/en-us/articles/115003963468-Enabling-Flash-for-Google-Chrome-Windows-Macintosh-