Usually a driver issue. Reinstall the USBasp driver using Zadig. "Target power not detected":
Sinaprog 2.1.1 continues the project’s role as a straightforward, reliable tool for serial-based firmware programming. It’s particularly valuable for developers and maintainers who prioritize minimal dependencies, scripting-friendly behavior, and robustness on constrained systems. For exact bugfixes and technical details, consult the project’s official changelog or repository. Sinaprog 2.1.1
We look forward to hearing your feedback and helping you unlock the full potential of Sinaprog 2.1.1. Usually a driver issue