Error in installing theme

I tried to install a premium theme and always getting error:

Warning: require_once(/home/xxxxxx/public_html): failed to open stream: No such file or directory in /home/xxxxx/public_html/wp-content/themes/rehub/functions.php on line 185

Fatal error: require_once(): Failed opening required ” (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/xxxxx/public_html/wp-content/themes/rehub/functions.php on line 185

I have 2 premium themes and both came out with this error. I read a few troubleshooting at this forum and none is helping. This problem only occurs with premium theme and the others are just fine. Help please