experiment code not found on front end

Hi.

I have installed Google Analytics for WordPress, and WP Content Experiments & Event Tracking.

I have activated Google Analytics.

I have turned on the experiment code section for my home page, and inserted the experiment code, and saved the page.

However, the experiment code is not found on the front end of the website.

I have successfully used your plugin on another website, but not this website.

Any ideas why? Thank you.

https://ww.wp.xz.cn/plugins/wp-content-experiments-event-tracking/