Fix #19022 (#19047)

Author: kimadeline

src/client/languageServer/watcher.ts

@@ -159,6 +159,7 @@ export class LanguageServerWatcher
 
         // Instantiate the language server extension manager.
         const languageServerExtensionManager = this.createLanguageServer(serverType);
+        this.workspaceLanguageServers.set(key, languageServerExtensionManager);
 
         if (languageServerExtensionManager.canStartLanguageServer()) {
             // Start the language server.
@@ -171,8 +172,6 @@ export class LanguageServerWatcher
             await languageServerExtensionManager.languageServerNotAvailable();
         }
 
-        this.workspaceLanguageServers.set(key, languageServerExtensionManager);
-
         return languageServerExtensionManager;
     }