I believe Contact Form 7 is included with Avada theme that I purchased. This plugin has been installed on my site ever since I installed Avada and built the site (around 2018)
this is the page that caused the error, but it happens on a lot of different pages. I get emails about technical issue from different pages. My guess is the Contact Form 7 is trying to load sendblue api but cannot and throws the trait not found error