i was pay the theme HostWHMCS
and after i install the plugins
there is problem com with too from them
Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected ‘[‘ in /home/webhost/public_html/wp-content/plugins/hostwhmcs-core/hostwhmcs-core.php on line 34
Notice: ob_end_flush() [ref.outcontrol]: failed to delete buffer zlib output compression in /home/webhost/public_html/wp-includes/functions.php on line 3718
and also the
WHMCS bridge plugin when i install it all my server have problem
so can you please tell me what i need to do and why this happens