Error while trying to run, any idea what might have caused it?

[wedgevic]

This is what happens every time I try to run street merchant. I know it has something to do with discord; I just don't know what. Any help is appreciated. Thanks!

[email protected] prestart C:\streetmerchant
npm run compile

[email protected] compile
tsc

[email protected] start C:\streetmerchant
node build/src/index.js

ＳＴＲＥＥＴＭＥＲＣＨＡＮＴ
3.5.0
[10:49:01 AM] info :: ℹ selected series: 3060, 3060ti, 3070, 3070ti, 3080, 3080ti, 3090, rx6700xt, rx6800, rx6800xt, rx6900xt, ryzen5600, ryzen5800, ryzen5900, ryzen5950, sf, sonyps5c, sonyps5de, xboxss, xboxsx
[10:49:01 AM] info :: ℹ selected stores: amazon, bestbuy
C:\streetmerchant\node_modules\discord.js\src\rest\RESTManager.js:32
const token = this.client.token ?? this.client.accessToken;
^

SyntaxError: Unexpected token '?'
at wrapSafe (internal/modules/cjs/loader.js:931:16)
at Module._compile (internal/modules/cjs/loader.js:979:27)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)
at Module.load (internal/modules/cjs/loader.js:879:32)
at Function.Module._load (internal/modules/cjs/loader.js:724:14)
at Module.require (internal/modules/cjs/loader.js:903:19)
at require (internal/modules/cjs/helpers.js:74:18)
at Object. (C:\streetmerchant\node_modules\discord.js\src\client\BaseClient.js:4:21)
at Module._compile (internal/modules/cjs/loader.js:1015:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1035:10)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start: node build/src/index.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\user\AppData\Roaming\npm-cache_logs\2021-09-08T15_49_02_698Z-debug.log

[wedgevic]

Update: I was able to fix it by upgrading my NodeJs version, as I was only using version 12