Im getting the below error pls help to resolve them


fwrite(): supplied argument is not a valid stream resource in

fopen(system/logs/error.txt) [function.fopen]: failed to open stream: No such file or directory in

fwrite(): supplied argument is not a valid stream resource in

session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/shopping/public_html/core/lib/log.php:34) in

pls do the needful