Getting "protoc": executable file not found in $PATH when running "go generate" command

Question

We have an application written in GoLang and we are using GRPC for defining service contracts.

When we try to run "go generate" command to generate stub from proto file it gives following error:

main.go:4: running "protoc": exec: "protoc": executable file not found in $PATH

Command format in code:

//go:generate protoc -I . --go-grpc_out=. --go_out=.  ./proto/service.proto

Note:

• I have already installed protoc-gen-go and protoc-gen-go-grpc
• Tried to search for the above error but haven't been able to find a solution yet.