Cellocad is not working

[Corgi-welsh]

Hi, I recently use cellocad to make some example of genetic circuit, but I got some error with web interface.
When I try to click the "Load the example" in Veliog tab there's nothing happen.
This also happens with Input and Output tab when tries to select the file.
Before this problem occur, cellocad seemingly working but when I try to run the cello I got following error.

"The Verilog code did not produce a valid netlist."