[New Blog Templates] Blog. templates Deprecated Function Errors

I understand this is a legacy product, but I need help eliminating the numerous entries we are getting in our server error logs every day:

[22-Apr-2019 17:40:04 UTC] PHP Deprecated: Function create_function() is deprecated in /home/account/public_html/wp-content/plugi

ns/blogtemplates/blogtemplatesfiles/blog_templates.php on line 37

I just discovered we literally have thousands of these errors in our error log, which grows exponentially every day. Please ee replies for notes and relative screenshot.