@Joshua Roberge​ :

The error message suggests that the installation of Detectron2 failed due to a missing file (cusparse.h) related to CUDA. To resolve this issue, you can try the following steps:

1. Check CUDA Installation: Ensure that CUDA is properly installed on your system. You can verify the installation by running nvcc --version in your terminal and checking if it returns the CUDA version.
2. Check CUDA Compatibility: Make sure the CUDA version installed on your system is compatible with the version of Detectron2 you are trying to install. Refer to the Detectron2 documentation or repository for information on the required CUDA version.
3. Install CUDA Toolkit: If CUDA is not installed or an incompatible version is present, you may need to install the appropriate version of the CUDA Toolkit. You can download the CUDA Toolkit from the NVIDIA website and follow the installation instructions specific to your operating system.
4. Update PyTorch: Ensure that you have the latest version of PyTorch installed.

!pip install torch --upgrade

Finally, Retry Detectron2 Installation: After verifying the CUDA installation and updating PyTorch, attempt to reinstall Detectron2 using the pip command you provided: