Xenvironment's engine throwing an error "Exception in 'LaunchMaster()'"

We currently have a register that is throwing an error when any secondary application is launched from Xenvironment's 'engine' with the error 'Exception in 'LaunchMaster()'. I can launch any application manually by executing the respective launch script (batch) manually; (xenv_ui, xstore, dataloader, etc.). Engine itself appears to be running without issue in the background, as I can see activity from environment in the process.log and an active process in task manger.

Each application has a slightly different error in the logs, but they all pretty much point back to launchmaster being the problem.

Examples:

Launching xenv_ui: