I am following the instructions from https://grpc.io/docs/languages/cpp/quickstart/
in order to install grpc using cmake, but I run into a permission issue.
Running gRPC C++ protocol buffer compiler on src/proto/grpc/reflection/v1alpha/reflection.proto
/bin/sh: 1: /home/user/external/grpc/cmake/build/third_party/protobuf/protoc-3.19.4.0: Permission denied
What could cause this and how to fix it?