unable to install sfdx scanner plugin

Question

i am trying to install sfdx scanner. its giving me this error. anyone knows this below error

warning "@salesforce/lwc-dev-server > request-promise-native > request-promise-core@1.1.4" has unmet peer dependency "request@^2.34".
C:\Program Files\Salesforce CLI\client\node_modules\yarn\lib\cli.js:78723
    compromised = compromised || function (err) { throw err; };
                                                  ^

Error: Unable to update lock within the stale threshold
    at C:\Program Files\Salesforce CLI\client\node_modules\yarn\lib\cli.js:78645:66
    at FSReqCallback.oncomplete (fs.js:156:23) {
  code: 'ECOMPROMISED'
}
Installing plugin @salesforce/sfdx-scanner... failed
    Error: yarn add @salesforce/sfdx-scanner@latest --non-interactive 
    --mutex=file:C:\Users\XXXXXXX\AppData\Local\sfdx\yarn.lock
    --preferred-cache-folder=C:\Users\XXXXXXXXXX\AppData\Local\sfdx\yarn --check-files       
    exited with code 1

after installing

@salesforce/lwc-dev-server 2.9.0
├─ @oclif/plugin-help 2.2.3
└─ @oclif/plugin-update 1.3.10
evergreen 0.34.0
└─ evergreen-build 0.20.2
(node:14504) [UnknownConfigKey Plugin: sfdx-cli] UnknownConfigKey Plugin: sfdx-cli: Unknown config key: disableTelemetry
module: @oclif/config@1.17.0
task: runHook prerun
plugin: sfdx-cli
root: C:\Program Files\Salesforce CLI\client
See more details with DEBUG=*

Answer 1

Try reinstalling the lwc-dev-server:

npm install -g @salesforce/lwc-dev-server @salesforce/sfdx-scanner

Remove the -g if you only want it installed locally (within the current project).

Add --save-dev if you want to also update your package.json file.

Answer 2

I resolved this issue by restarting Visual Studio Code after installing node.js