Whether the above error is shown when HMWP is activated or any other plugin/theme, it is obvious that the error is generated by Avada – array_map() function as it is not programmed to handle when valid argument is not passed to it.
However, can you please let us know your site’s wp-admin login details as private reply so that we can look into it. Also, in which page (URL) can we see the above mentioned error?
I checked wordpress error log and could see the error message there. Now I tried saving HMWP settings and also saving the page, but the error is not being generated. Can you please let us know when exactly is the error message generated?