Enable "Expert mode". Then scroll down and disable "Block data URL pages"
Don't block all unencrypted requests
It might conflict with other extensions that modifies CSP response header too. Don't know how to fix compatibility with other extensions.
Test if its working:
Go to a site like https://www.deviceinfo.me/
If it shows a ton of information (like mouse movement) its not working. If it shows very little (like IP Address, Country, Latitude & Longitude and just a few other things), its probably working.