Superloup10@Superloup10PC MINGW64 /c/NodeBB (v1.15.x)
$ ./nodebb setup
Dependencies outdated or not yet installed.
Installing them now...

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: nodebb@1.15.0
npm ERR! Found: postcss@8.0.6
npm ERR! node_modules/postcss
npm ERR!   postcss@"8.0.6" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer postcss@"^8.1.0" from autoprefixer@10.0.1
npm ERR! node_modules/autoprefixer
npm ERR!   autoprefixer@"^10.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\Superloup10\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Superloup10\AppData\Local\npm-cache\_logs\2020-11-06T15_18_57_862Z-debug.log
Error installing dependencies!
message: Command failed: npm install --production
stdout: null
stderr: null
C:\NodeBB\src\cli\package-install.js:81
                throw e;
                ^

Error: Command failed: npm install --production
    at checkExecSyncError (node:child_process:636:11)
    at Object.execSync (node:child_process:672:15)
    at Object.installAll (C:\NodeBB\src\cli\package-install.js:72:9)
    at Object.<anonymous> (C:\NodeBB\src\cli\index.js:60:18)
    at Module._compile (node:internal/modules/cjs/loader:1083:30)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1112:10)
    at Module.load (node:internal/modules/cjs/loader:948:32)
    at Function.Module._load (node:internal/modules/cjs/loader:789:14)
    at Module.require (node:internal/modules/cjs/loader:972:19)
    at require (node:internal/modules/cjs/helpers:88:18) {
  status: 1,
  signal: null,
  output: [ null, null, null ],
  pid: 10060,
  stdout: null,
  stderr: null
}