command "lightning dev app" not working, throwing error "missing message messages:flags.optionalTargetOrg.summary"

Start by reproducing the reported failures with sf lightning dev app and sf lightning dev site -n demo on Windows, using the listed CLI and plugin versions. Inspect the plugin command entry points and .localdev/demo/app/site/.metadata/runtime-info.json; completion should address the missing message, initial folder error, and documented LWC refresh behavior without introducing regressions.

Summary

command "lightning dev app" not working, throwing error "missing message messages:flags.optionalTargetOrg.summary for locale en_US"

Details:

When I'm running sf lightning dev app command, it is asking for the device type and the app, but failed after that

The same error I got when I installed the plugin with command
sf plugins install @salesforce/plugin-lightning-dev
I used powershell and ran that with admin permissions.

Not sure if the following point is related to any issue mentioned above, but here are the details.
When I run the site with sf lightning dev site -n demo, this opens the preview in browser, but no further changes in lwc are reflected there, tried simple text changes to adding more tags, page refresh doesn't help as well.

Also, when I run the site command first time, I get the following error even if I run it as admin, though it started working when I manually renamed the folder from bld to app.

Expected Result

1. Plugin should be installed without any error
2. lightning dev app command should work fine
3. output window for lightning dev site command should be refreshed automatically on lwc changes as mentioned in documentation

Actual Result

1. Plugin installation should be succeeded without any error
2. lightning dev app command fails with the error
3. lightning dev site command should refresh the output automatically

System Information

SF CLI: powershell

sf version output

{
  "architecture": "win32-x64",
  "cliVersion": "@salesforce/cli/2.83.7",
  "nodeVersion": "node-v22.14.0",
  "osVersion": "Windows_NT 10.0.22631",
  "rootPath": "C:\\Program Files\\sf\\client",
  "shell": "powershell",
  "pluginVersions": [
    "@oclif/plugin-autocomplete 3.2.26 (core)",
    "@oclif/plugin-commands 4.1.22 (core)",
    "@oclif/plugin-help 6.2.27 (core)",
    "@oclif/plugin-not-found 3.2.48 (core)",
    "@oclif/plugin-plugins 5.4.36 (core)",
    "@oclif/plugin-search 1.2.23 (core)",
    "@oclif/plugin-update 4.6.36 (core)",
    "@oclif/plugin-version 2.2.27 (core)",
    "@oclif/plugin-warn-if-update-available 3.1.38 (core)",
    "@oclif/plugin-which 3.2.34 (core)",
    "@salesforce/cli 2.83.7 (core)",
    "apex 3.6.11 (core)",
    "api 1.3.3 (core)",
    "auth 3.6.108 (core)",
    "data 4.0.24 (core)",
    "deploy-retrieve 3.21.3 (core)",
    "info 3.4.51 (core)",
    "lightning-dev 2.10.3 (user) published 38 days ago (Tue Mar 04 2025)",
    "limits 3.3.51 (core)",
    "marketplace 1.3.7 (core)",
    "org 5.5.7 (core)",
    "packaging 2.12.3 (core)",
    "schema 3.3.58 (core)",
    "settings 2.4.22 (core)",
    "sobject 1.4.53 (core)",
    "telemetry 3.6.37 (core)",
    "templates 56.3.43 (core)",
    "trust 3.7.78 (core)",
    "user 3.6.16 (core)",
    "@salesforce/sfdx-plugin-lwc-test 1.2.1 (user) published 188 days ago (Sat Oct 05 2024)",
    "@salesforce/sfdx-scanner 4.10.0 (user) published 44 days ago (Tue Feb 25 2025) (latest is 4.11.0)",
    "sfdx-plugin-source-read 1.5.0 (user) published 31 days ago (Tue Mar 11 2025) (latest is 1.5.1)",
    "texei-sfdx-plugin 2.8.3 (user) published 31 days ago (Mon Mar 10 2025)"
  ]
}

OS: Windows 11

Experience Sites Only:

.localdev/demo/app/site/.metadata/runtime-info.json

{
  "orgId": "00DH40000002d2P",
  "siteId": "0DMH4000000L4PR",
  "clwrVersion": "254.165",
  "coreVersion": "",
  "coreChangelist": "52840165",
  "bundleGenerationDate": "Apr 11, 2025 9:15:31 AM",
  "siteTemplateName": "microsite-template-marketing",
  "deployTarget": "CORE"
}