Add guard before checking locally installed backends

extensions/llamacpp-extension/src/backend.ts

@@ -18,6 +18,7 @@ export async function getLocalInstalledBackends(): Promise<
     'llamacpp',
     'backends',
   ])
+  if (await fs.existsSync(backendsDir)) {
     const versionDirs = await fs.readdirSync(backendsDir)
 
     // If the folder does not exist we are done.
@@ -37,6 +38,7 @@ export async function getLocalInstalledBackends(): Promise<
         }
       }
     }
+  }
   return local
 }