Not all emulators are equal. If BlueStacks fails, try or MuMu Player 64-bit . Some users report that Dragon Raja works flawlessly on MuMu while crashing on BlueStacks due to different virtualization layers.
If standard repairs do not work, secondary causes such as corrupted registry entries or incorrect execution modes may be the culprit. Run the /fixguids Command Command Prompt as an Administrator. dragon failed to launch 64 bit server