control_id depreciated

I had to leave my website sitting for a few months. Before I left it it was “working” with no error messages. The site is a long way from complete, but there were no errors. I just came back and found this on my home page:

Deprecated: The $control_id argument is deprecated since version 3.5.0! in /home2/frankni1/public_html/wp-content/plugins/elementor/modules/dev-tools/deprecation.php on line 301

Any suggestions on how to fix this?

The page I need help with: [log in to see the link]