i've installed a plug-in for buddypress. getting an error

hey. i’ve installed a plug-in that’s having some issues with the current set up my multisite.

i have a second, *separate* test multisite which I installed the plug-in into; and there is no error, thus the first multisite must have a conflict somewhere.

what does this error suggest?

Warning: file_put_contents(/nas/wp/www/staging/intothemythica/wp-content/uploads/userpro/.htaccess) [function.file-put-contents]: failed to open stream: No such file or directory in /nas/wp/www/common/production/php_prevent_flock.php on line 21