Missing electron_sdk.proto file on version 5.7.1

Description
The recent release doesn’t have the electron_sdk.proto file that may be needed to rebuild the Electron SDK. In my case, it wasn’t necessary but based on the doc if using protobuf higher than 3.4.0 we have to run protoc.exe. Is the documentation outdated?

Which Electron Meeting SDK version?
5.7.1

Screenshots

Device (please complete the following information):

  • Device: [e.g. Apple MacBook Pro (13-inch, M1)]
  • OS: [e.g. macOS Big Sur 11.2.1 ]

Additional context
Add any other context about the problem here.

Same issue here. Can not build.