LiveView file server unavailable error.

To resolve this issue, clean the project and terminate all node instances :

•  From the menu bar, select Project >Clean.... Make sure your project is selected and click OK.
•  From a terminal, run "killall node"
•  Rerun the project.

If the issue persists then disable the LiveView button (small eye icon) from the top menu bar of the Studio.

Hope this helps.