Minor fixes.

CHANGELOG.txt

 
-GridStack 3.0.x-dev, 2023-09-18
--------------------------------
+GridStack 3.x-dev, 2023-09-18
+-----------------------------
 - Initial 3.x.

docs/README.md

@@ -26,7 +26,7 @@ plugin.
 ***
 ## <a name="first"> </a>FIRST THINGS FIRST!
 Read more at:
-* [Github](https://git.drupalcode.org/project/blazy/-/blob/8.x-2.x/docs/README.md#first-things-first)
+* [Github](https://git.drupalcode.org/project/blazy/-/blob/3.0.x/docs/README.md#first-things-first)
 * [Blazy UI](/admin/help/blazy_ui#first)
 
 ***

gridstack.install

@@ -19,7 +19,7 @@ function gridstack_requirements($phase) {
   $path = gridstack()->getLibrariesPath('gridstack')
     ?: \Drupal::root() . '/libraries/gridstack';
 
-  if (is_dir($path)) {
+  if ($path && is_dir($path)) {
     $exists = is_file($path . '/dist/gridstack-static.js') && is_file($path . '/dist/gridstack-h5.js');
   }