How to Fix the vMix D3D Startup Error: A Complete Guide Starting up your live stream only to be met with a D3DERR_INVALIDCALL
Go to C:\Users\[YourUsername]\AppData\Local\StudioCoast_Pty_Ltd . Delete the subfolders (they start with vMix64.exe_Url_... ). Restart vMix; it will rebuild these files automatically. 📈 Diagnostic Tools vmix d3d startup error
Press Win + Ctrl + Shift + B simultaneously. Your screen will flash and beep. This resets the graphics driver stack without a reboot. Try launching vMix again. How to Fix the vMix D3D Startup Error: