Please install Visual C++ Redistributable 2015, if the latest version is installed, please download the latest Visual C++ Redistributable 2015 - 2019. If you are using Windows 7, please update to Windows 7 SP1, install the latest graphics driver and Windows Update KB2670838.
Please update your OS to macOS 10.14 (Mojave) or above. Previous OS versions might have compatibility issues.
Due to numerous types of systems, please kindly share your OS version and the steps taken before the issue happen. And contact FLUX Support.