Retrieve value from an array
Try $row['uri'] instead.  As 'uri'  is merely the key and not another object.

In this line of code:

$block['content'] .= '&lt;img style="width: auto; height: 100px;" src="'.file_create_url($row-&gt;uri). '" alt="Vores support medarbejder" /&gt;';

you refer to another object, the uri ($row-&gt;uri). Within the $row array, that you printed with print_r, there is the key 'uri'. To get the value of that key you should use $row['uri'].