Okay...what signup software is that? LeadConnector? If it really depends on that Facebook pixel...ditch it.
https://wordpress.org/plugins/leadconnector/
https://www.leadconnectorhq.com/privacy-policy
The browser is trying to load that asset from Meta, which can reveal pretty usefull metadata (from me and my browser) for them. I think you should use something else (there are many other WordPress plugins which do better I guess).