Cluster.fork() is not a function #42887

Affected URL(s)

https://nodejs.org/dist/latest-v16.x/docs/api/cluster.html#event-exit

Description of the problem

I have rewrite The program as part of learning And caused error with the code on creating a worker with cluster
But doesn't have errors on the previous sections of cluster that uses cluster.fork() But that was used inside the cluster.isPrimary if block.After i have copied the code same error throws again (Only in the described section)