Fatal error upon installing a new theme.

Hai guys, I am really new to the wordpress.
it was all going good until I got the error upon installing a theme, as a result i am unable to open either my site or WP-admin.here is the error, Looking out for a solution, Thanks in advance. ??

Warning: require(/home/avinash1229/public_html/wp-content/themes/baki-free/inc/welcome.php): failed to open stream: No such file or directory in /home/avinash1229/public_html/wp-content/themes/baki-free/functions.php on line 217

Fatal error: require(): Failed opening required ‘/home/avinash1229/public_html/wp-content/themes/baki-free/inc/welcome.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/avinash1229/public_html/wp-content/themes/baki-free/functions.php on line 217