If you are seeing something like this when going to the settings page of ShortPixel Image Optimizer or ShortPixel Adaptive Images…
…it is most probably a cache issue. Please make sure to clean your website cache: How to clear WordPress cache
If your settings page looks instead something like this…
…or like this…
This is caused by another plugin. Please deactivate all your plugins and activate them one by one while refreshing the ShortPixel’s settings page to find out which one is the “bad” plugin.