Check that you selected the correct "main executable".
Furioos will detect all .exe and .bat files in your project, you need to select the correct one to start your application.
Check the performances of your application on the server.
By using the statistic button during a session, you can vizualize the current usage of the server hardware.
If the performance of the server aren't good enough, please try to upgrade the configuration to HIGH. If the HIGH configuration isn't enough, you may need to optimize your application.
Your application need prerequisites? In that case, it means that your application is not portable, you'll need to embed the prerequisites in your application. Here is the list of prerequisites installed on Furioos servers:
Visual C++ Redistribuables Packages 2010 to 2019
.NET Framework 4.0
Unreal Engine prerequisites