Hi,
I think, as per this blog https://www.igmguru.com/blog/how-to-become-a-sitecore-cms-developer/ and https://discussions.corebos.org/printthread.php?tid=2697, you should go to the codebase where loadRelatedListBlock is supposed to be defined. This function should exist in your coreBOS codebase, likely in a JavaScript file included for handling related lists.
I think, as per this blog https://www.igmguru.com/blog/how-to-become-a-sitecore-cms-developer/ and https://discussions.corebos.org/printthread.php?tid=2697, you should go to the codebase where loadRelatedListBlock is supposed to be defined. This function should exist in your coreBOS codebase, likely in a JavaScript file included for handling related lists.
Thanks