It maybe something wrong with your host.. or the folder you're uploading to was changed inthe FTP client.
Check your FTP settings make sure they point to the settings your webhost requires. The error message is saying you're trying to write to a file but you do not have permission for it. SO I'm gonna guess your FTP client isn't set correctly for your particular site.
I've never used hippie so I can't help much with that.
It really depends on what your webhost requires.
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