Block Inserter: directory search: infinity spinner if offline

[Drivingralle]

If a user is offline or in playground the network access is blocked the search section of the block inserter is showing the spinner infinity.

Inside the browser console the request (​https://playground.wordpress.net/scope:calm-trendy-town/wp-json/wp/v2/block-directory/search?term=slider&_locale=user) very quickly returns a 500. But the UI never reflects to it.

Similar to the section above it I was expecting an error message if the search fails.

[sainathpoojary]

Reproduction Report

Description

This report validates whether the issue can be reproduced.

Environment

• WordPress: 6.8-alpha-59590
• PHP: 8.2.27
• Server: Apache/2.4.62 (Debian)
• Database: mysqli (Server: 11.4.4-MariaDB-ubu2404 / Client: mysqlnd 8.2.27)
• Browser: Chrome 131.0.0.0
• OS: macOS
• Theme: Twenty Twenty-Five 1.0
• MU Plugins: None activated
• Plugins: None

Actual Results

✅ Error condition occurs (reproduced).

Supplemental Artifacts

Video: ​https://utfs.io/f/PL8E4NiPUWyO7WG5Lz9AWOSNT8iuxYqzcvCVIEKbQmF3njPo

[vrishabhsk]

This is a fix that was to be made in Gutenberg for which I have raised a PR

​https://github.com/WordPress/gutenberg/pull/68600

Attaching the patch here as well.

diff --git a/packages/block-directory/src/store/resolvers.js b/packages/block-directory/src/store/resolvers.js
index cd13ba5ccd..846ff9ef2b 100644
--- a/packages/block-directory/src/store/resolvers.js
+++ b/packages/block-directory/src/store/resolvers.js
@@ -35,5 +35,7 @@ export const getDownloadableBlocks =
 			);
 
 			dispatch( receiveDownloadableBlocks( blocks, filterValue ) );
-		} catch {}
+		} catch ( error ) {
+			dispatch( receiveDownloadableBlocks( [], filterValue ) );
+		}
 	};