Wordpress mod security error

My domain routed via Cloudflare to HostGator hosting and use WordPress
I’ve tried to add retargeting pixel code and always get Mod_Security error
Contacted hosting support and they clould not help, told me to ask Cloudflare support
here is a short video what happens in real time
Could anyone help me to sort this problem?

This topic was automatically closed after 30 days. New replies are no longer allowed.