Package Slices is not in GOROOT error when building REI3

Im trying to build my own REI3 on ubuntu 22.04 and i run

go build -ldflags "-X main.appVersion=3.6"

I get the following error:

handler/handler_error.go:7:2: package slices is not in GOROOT (/usr/lib/go-1.18/src/slices)

Not sure why its giving this error. GOLANG is installed properly and at latest version.

Any assistance would be highly appreciated. Thank you.

Edit

I found another post explaining the issue. Problem Solved.