SHELL

Unable to resolve dependency tree error when installing npm packages

npm install --save --legacy-peer-deps

ERESOLVE unable to resolve dependency tree

npm config set legacy-peer-deps true
npm cache clean --force

how to deal with ERESOLVE unable to resolve dependency tree

npm install --legacy-peer-deps

You have dependency conflict (incorrect & potentially broken dependency)
Try to run the command with --force, or --legacy-peer-deps.
If it doesn't take effect, the temporary solution is using prior 
versions of the Node.js (downgrading the Node.js version) as
it causes this kind of errors to happen sometimes.

unable to resolve dependency tree

npm config set legacy-peer-deps true

Unable to resolve dependency tree error when installing npm packages

try to run the npm command with --force, or --legacy-peer-deps
EXEMPLE : npm install react-router-dom --force