Is there a message in the command line window for an error of some kind?
In the mean time, here's invoke's video on adding models: https://www.youtube.com/watch?v=4aCsmiwwyEI
Mildly out of date, select checkpoint/safetensors and then v1 for model type.
InvokeAI - https://github.com/invoke-ai/InvokeAI
This software is free and open source - You can download and run it here, but make sure to check system requirements.
https://github.com/invoke-ai/InvokeAI/releases
With 2.2.5, InvokeAI allows you to easily add both standard and custom Stable Diffusion models directly from the UI. This video cov...