some fix

kernel/filters/BootstrapSelectFilter.php

@@ -13,8 +13,9 @@ class BootstrapSelectFilter extends Filter
     {
         $select = SelectBuilder::build($this->name, [
             'class' => 'form-control',
-            'options' => $this->param,
+            'options' => $this->params['options'],
             'value' => $this->value,
+            'prompt' => $this->params['prompt'] ?? null,
         ]);
 
         return "<td>" . $select->create()->fetch() . "</td>";