I understand you have a Windows machine and you are trying to access a LAMP server in the cloud, is this correct? In that case, could you please let us know in which cloud platform the Bitnami instance is running?
If you are using a local installer, why are you trying to use Filezilla? Please note that you don't need to use Filezilla to access the files. You can find them inside the installation directory you selected when installing the stack.