Thread:Project:Support desk/Exception from line 1871 of /w/includes/filerepo/file/LocalFile.php: Could not acquire lock for 'npose n.png.'/reply (6)

Note that giving write permissions to 'others' (which the last 7 means) is dangerous. You should make sure that everything is no more than 775. If that doesn't work, then most likely the owner or group of some of the files is incorrect.