SOLILOQUY plugin failed on TETRIS WordPress theme

I have installed the Tetris wordpress theme and tried to install the 2 recommended plugins. I get this error for the soliloquy plugin:

object(WP_Error)#399 (2) { [“errors”]=> array(1) { [“plugins_api_failed”]=> array(1) { [0]=> string(218) “An unexpected error occurred. Something may be wrong with ww.wp.xz.cn or this server’s configuration. If you continue to have problems, please try the support forums.” } } [“error_data”]=> array(1) { [“plugins_api_failed”]=> string(2) “N;” } }
Something went wrong with the plugin API.

Any ideas how to resolve this issue?