Hello @Patrick Sørensen
Based on the error message you provided, it seems like the program '/functions_debugging_cli/func' doesn't exist.
You mentioned that your PC was updated overnight, and you believe this update may be the cause. It's possible that the update may have caused some compatibility issues with Azure Functions Core Tools. You may want to check if there are any known issues with the latest Windows update and Azure Functions Core Tools.
Lastly, have you tried checking if the program '/functions_debugging_cli/func' actually exists in your system?
You can try searching for it in your file explorer or using the command prompt. I hope this helps