Wordpress Contact Forms 7 integration stopped working

[SCCDP]

I had three Contact Form 7 forms set up in Wordpress to add email addresses to Constant Contact.  Around February 4, 2021, the integration stopped working.  I have contacted the plug in author.  He says I must have a conflict with some other plug in, and suggested I tear down my site to just one plug in, and see if the problem goes away.  I need to keep my Web site working, so, after several weeks of work with my hosting vendor, we got a bare bones test site set up.  I have it stripped down to just the one plug in, and it still doesn't work.  I relayed this information to the plug in author, but have not been able to raise a reply.  

Just as a sanity check, I tried using WPForms integration with Constant Contact.  It works perfectly.  That would be enough for me to switch, but most of the features I need are locked up in a paid premium version.  My budget is zero, so, using a paid premium version is not possible.

Can you, please, help me to debug the plug in, since the author is not responding?

My test Web site is at: 

I can give you administrator access, if you need it.  

Thank you.

[William_A]

Hello @SCCDP ,

Unfortunately, we do not have access to any of Form 7's systems, so our integrations Tier 2 team would not be able to troubleshoot the issue at all, even with access to your test site. With that said, your best options are to:

• Continue working directly with Contact Form 7 support
• Use our WP plugin
• Or use a landing page sign-up form