In order for Decoda to execute your sandbox, we need to configure the Decoda project with the following settings. You can access the project settings by navigating to Project | Settings. Typically, we'll have Decoda run the Release version of the sandbox executable for performance. Unless you need to debug the C++ sandbox code and Lua scripts at the same time, it's advisable to run the Release version of your executable.
The configuration of new Decoda project debug settings