Rosetta Code:Village Pump/Can't upload Images

Can't upload Images
This is a particular discussion thread among many which consider Rosetta Code.

Summary

Permission errors when trying to upload images

Discussion

Here are the errors I get when trying to upload images:

Could not read or write file "mwstore://local-backend/local-public/b/b0/Knights_Tour.gif" due to insufficient permissions or missing directories/containers.

Could not store file "/tmp/phpgaCqHY" at "mwstore://local-backend/local-public/b/b0/Knights_Tour.gif".
Could not delete lock file for "mwstore://local-backend/local-public/archive/b/b0".
Could not delete lock file for "mwstore://local-backend/local-public/b/b0".
Could not delete lock file for "mwstore://local-backend/local-public/archive/b/b0/20170525130227!Knights_Tour.gif".