Gatling Frontline Sample Script


I am very new to Gatling frontline and been trying to run the sample script provided in Gatling Frontline through AWS. However, I’m facing an issue. If I build the sample script on the demo instance manually, the build is successful. But when I run it from Gatling Frontline interface by creating a new simulation, it throws an exception ‘unable to find the simulation class’.
Here is the link to the repo that I have created for the sample project that I’m using:

Any help would be appreciated.

Thank you.