Hi,

From Soledad version 8.0.7 - we added a new section/options inside Customize for help you can optimize the site speed - It's easier & better than before. The plugin Penci PageSpeed Optimizer is not needed anymore ( we've included all new speed optimization features inside the "Penci Shortcodes & Performance" plugin ). So, please deactivate & remove it after updating the theme to the latest version.

In short, please follow these steps:

• Deactivate Penci PageSpeed Optimizer,
• Clear all the site cache,
• Update Penci Shortcodes & Performance plugin to the latest version by going to Appearance → Install Plugins,
• Following the new PageSpeed Optimization document here: https://soledad.pencidesign.net/soledad-document/#speed-optimization
• Enable Cache plugin again

Regards, 

PenciDesign.