edit

src/Database.php

@@ -2708,7 +2708,7 @@ class Database
 
                 $button = $this->list_tbody_button($config, $data[$k]);
                 if ($button == '<td></td>') {
-                    $button = str_replace('<td></td>', '<td>nbsp;</td>', $button);
+                    $button = str_replace('<td></td>', '<td>&nbsp;</td>', $button);
                 }
                 $result[$k] .= $button;