[SOLVED] Charts don't work on production server


I just deployed my first Scriptcase site to it’s production server and almost everything worked super smooth.
It only seems that charts won’t display correctly. I can see the data breakdown, but instead of the chart I only receive the message “Error in loading data” (as seen on the first screenshot). The same chart works fine on the development server though (second screenshot).
Is there something that has to be configured on the server (plain vanilla LAMP install on EC2 Ubuntu server) to make this work?

thanks in advance,

Screen Shot 2013-12-19 at 11.14.56 AM.jpg

Screen Shot 2013-12-19 at 11.14.10 AM.jpg

Never mind. The last deploy made the tmp directory read only. Changed it back to read/write and everything works again.