[AspireE2E] When running the Starter App (Express/React) project using aspire run in CMD, the following error occurred: Timed out waiting for AppHost server to start after 60 seconds.

[v-reinawang]

REGRESSION INFO: Not repro on previous Aspire CLI version 13.2.0

INSTALL STEPS

1. Clean machine: Windows x64 25h2
2. Install SDK 10.0 201
3. Install Aspire.CLI 13.2.0
   • iex "& { $(irm https://aspire.dev/install.ps1) } -Quality staging"
   • aspire config set -g features:stagingChannelEnabled true

REPRO STEPS

1. Open a normal Command Prompt
2. Use aspire new to create a Starter App (Express/React) project
3. Go to the project folder and run the app with aspire run

Actual Result
❌ An unexpected error occurred: Timed out waiting for AppHost server to start after 60 seconds. Check the debug logs for more details.

If I press Ctrl + C to stop running, two "Stopping Aspire" messages will appear.

[2026-03-20 05:57:28.318] [INFO] [Program] Version: 13.2.0+aad16017893bd769e0634c47fb007f1454735f11
[2026-03-20 05:57:28.319] [INFO] [Program] Build ID: 13.200.26.16909
[2026-03-20 05:57:28.319] [INFO] [Program] Working directory: C:\Users\v-reinawang\express11
[2026-03-20 05:57:28.419] [INFO] [Program] Command: aspire run
[2026-03-20 05:57:28.421] [INFO] [ProjectLocator] Found AppHost path 'apphost.ts' from config file in C:\Users\v-reinawang\express11
[2026-03-20 05:57:28.466] [INFO] [ConfigurationService] Found settings file at C:\Users\v-reinawang\express11\aspire.config.json
[2026-03-20 05:57:28.467] [INFO] [GuestAppHostProject] Loaded config from C:\Users\v-reinawang\express11 (file exists: True)
[2026-03-20 05:57:28.470] [WARN] [PrebuiltAppHostServer] Project reference assembly names file not found at C:\Users\v-reinawang\.aspire\packages\restore\7F14DD56C3A4EA62\libs\_project-ref-assemblies.txt
[2026-03-20 05:57:28.472] [INFO] [ConfigurationService] Found settings file at C:\Users\v-reinawang\express11\aspire.config.json
[2026-03-20 05:57:28.474] [INFO] [ConfigurationService] Found settings file at C:\Users\v-reinawang\express11\aspire.config.json
[2026-03-20 05:57:32.595] [INFO] [AppHost] 
[2026-03-20 05:57:32.595] [INFO] [AppHost] up to date, audited 115 packages in 1s
[2026-03-20 05:57:32.595] [INFO] [AppHost] 
[2026-03-20 05:57:32.596] [INFO] [AppHost] 35 packages are looking for funding
[2026-03-20 05:57:32.596] [INFO] [AppHost]   run `npm fund` for details
[2026-03-20 05:57:32.598] [INFO] [AppHost] 
[2026-03-20 05:57:32.598] [INFO] [AppHost] 1 high severity vulnerability
[2026-03-20 05:57:32.598] [INFO] [AppHost] 
[2026-03-20 05:57:32.598] [INFO] [AppHost] To address all issues, run:
[2026-03-20 05:57:32.598] [INFO] [AppHost]   npm audit fix
[2026-03-20 05:57:32.598] [INFO] [AppHost] 
[2026-03-20 05:57:32.598] [INFO] [AppHost] Run `npm audit` for details.
[2026-03-20 05:57:32.712] [INFO] [GuestAppHostProject] Generated 3 TypeScript files in C:\Users\v-reinawang\express11\.modules
[2026-03-20 05:58:28.999] [FAIL] [GuestAppHostProject] Timed out waiting for AppHost server to start after 60 seconds
[2026-03-20 05:58:29.000] [FAIL] [AspireCliTelemetry] An unexpected error occurred: Timed out waiting for AppHost server to start after 60 seconds. Check the debug logs for more details.
System.TimeoutException: Timed out waiting for AppHost server to start after 60 seconds. Check the debug logs for more details.
   at Aspire.Cli.Commands.RunCommand.<>c__DisplayClass20_0.<<ExecuteAsync>b__0>d.MoveNext() + 0x55
--- End of stack trace from previous location ---
   at Spectre.Console.Status.<>c__DisplayClass17_0`1.<<StartAsync>b__0>d.MoveNext() + 0x72
--- End of stack trace from previous location ---
   at Spectre.Console.Progress.<>c__DisplayClass32_0`1.<<StartAsync>b__0>d.MoveNext() + 0x272
--- End of stack trace from previous location ---
   at Spectre.Console.Internal.DefaultExclusivityMode.<RunAsync>d__3`1.MoveNext() + 0x168
--- End of stack trace from previous location ---
   at Spectre.Console.Progress.<StartAsync>d__32`1.MoveNext() + 0x71
--- End of stack trace from previous location ---
   at Spectre.Console.Status.<StartAsync>d__17`1.MoveNext() + 0x74
--- End of stack trace from previous location ---
   at Aspire.Cli.Interaction.ConsoleInteractionService.<ShowStatusAsync>d__17`1.MoveNext() + 0x190
--- End of stack trace from previous location ---
   at Aspire.Cli.Commands.RunCommand.<ExecuteAsync>d__20.MoveNext() + 0x4ef
[2026-03-20 05:58:29.001] [INFO] [Program] Exit code: 2

Expected Result
It can run successfully

[sebastienros]

Works for me:

[v-elenafeng]

Verified that this issue has been fixed in the latest Aspire 13.2 build.