./nodebb setup package.json not found. and problem

[TechComet]

Hello,

Node: v12.18.3
npm = 6.14.6

./nodebb setup
package.json not found.
Populating package.json...
/home/techcomet/NodeBB/src/cli/package-install.js:27
Object.entries(oldPackageContents.dependencies).forEach(([dep, version]) => {
^

TypeError: Cannot convert undefined or null to object
at Function.entries ()
at Object.updatePackageFile (/home/techcomet/NodeBB/src/cli/package-install.js:27:9)
at Object. (/home/techcomet/NodeBB/src/cli/index.js:19:18)
at Module._compile (internal/modules/cjs/loader.js:1137:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
at Module.load (internal/modules/cjs/loader.js:985:32)
at Function.Module._load (internal/modules/cjs/loader.js:878:14)
at Module.require (internal/modules/cjs/loader.js:1025:19)
at require (internal/modules/cjs/helpers.js:72:18)
at Object. (/home/techcomet/NodeBB/nodebb:5:1)