The Warning "Array to string conversion" appears after upgrade to Dreamweaver 21.7

The Warning "Array to string conversion" appears in Output Errors/Warnings after upgrade to Dreamweaver 21.7

The warning appears to be related to PHP code for a multidimensionial array. The cause of the warning can  be demonstrated with the following code.

<?php

$BlockedSaleDATA=array("Category Name"=>"","Date ON"=>"","Date OFF"=>"","Blocked Reason"=>"","Listings"=>array("SCAN"=>0,"FOUND"=>0,"TOTAL"=>0,"ForSale"=>0,"NotForSale"=>0,"SCANmatch"=>""),"Notes"=>"","Processed"=>0,"Action"=>"","DELETE"=>"00/00/00");

Add that code to a PHP file and you will see the warning in the Output tab.

Remove the following code from the instruction and the warning disappears.

,"Listings"=>array("SCAN"=>0,"FOUND"=>0,"TOTAL"=>0,"ForSale"=>0,"NotForSale"=>0,"SCANmatch"=>"")

It appears to me Dreamweaver is not validating dimensional arrays correctly.