Issue #3427571: Support '*' as value in manually created Search API q…

…ueries

src/Plugin/search_api/backend/SearchApiSolrBackend.php

@@ -3673,7 +3673,7 @@ protected function formatFilterValue($value, FieldInterface $field, ?string $typ
       case 'date':
         $value = $this->formatDate($value);
         if ($value === FALSE) {
-          return 0;
+          throw new SearchApiSolrException('Unsupported date value');
         }
         break;