We have tested a few images and see that they are already optimized. Optimizing them using our plugin based on your current settings (80%) doesn’t yield any results. That is why you see this as “Failed”. We will improve this error handling in our next theme update to avoid confusion.
You can test a few images manually via our demo interface here https://img-optim.xtemos.com/
Thanks a lot for your answer.
That means when there is an error it could possible be that its just optimizes enough?
I was updating to 8.4 but there are still the same error messages on almost 50% of my images.
We have just released a new version of the plugin with bug fixes. Please update it and test how it works. Let me know if you still see the same errors.