This error message indicates that the code is using a version of Protobuf that only supports C++14 or newer, and the current project is being compiled with an older version of C++.
To resolve this issue, you need to ensure that your project is being compiled with a C++14 compiler or newer. This may involve updating your build system or configuring your compiler settings appropriately.
You should also check that you are using the latest version of Protobuf that supports your target C++ standard. You can find more information on the supported versions of C++ for each release of Protobuf in the release notes or documentation.
Once you have updated your project’s compiler and Protobuf version as necessary, you should be able to compile your code without encountering this error message.