I know Magento. Would you be happen just getting rid of this plugin? I could do that for cheap? Or do you want it fixed? I know PHP really well - my last few full-time jobs were PHP. So I can fix it if that's what you want.
Dear Flexineon,
Mostly, This error occurred at the time of update because when magento update system or plugin it disable the tmpfolder. The description of error also can get from log file.
please dont worry I will fix it.
please come into chat for more discussion I'm waiting for your response.
Thanks