diff --git a/src/Repositories/BlueprintRepository.php b/src/Repositories/BlueprintRepository.php
index c2f01b4..4ff0089 100644
--- a/src/Repositories/BlueprintRepository.php
+++ b/src/Repositories/BlueprintRepository.php
@@ -74,6 +74,10 @@ public function find($blueprint): ?StatamicBlueprint
 
     public static function findBlueprint($namespace, $handle): ?Blueprint
     {
+        if ($namespace === null) {
+            return null;
+        }
+
         $registeredBlueprints = config('statamic.builder.blueprints', []);
 
         $namespace = str_replace('/', '.', $namespace);