As with other caching plugins, Slickstream needs to be excluded from WP Fastest Cache optimization. Here are instructions.
1. Login to WordPress and open the WP Fastest Cache panel and select the Exclude tab.
2. In the Exclude tab hit the Add New Rule button in the Exclude JS section.
3. Fill in the text box in the dialog that opens with slickstream and hit Save.
4. In the menu bar at the top of the screen hit Delete Cache and select Delete Cache and Minified CSS/JS.
Note, you may need to clear your CDN cache to see Slickstream components on your site after making these changes.
If you have any problems or these instructions are in any way unclear, please contact Slickstream directly at firstname.lastname@example.org.