Parsing-error on "post RPC"

[smondet]

Tried on google/ads/googleads/v18/services/google_ads_service.proto from https://github.com/googleapis/googleapis/:

google/ads/googleads/v18/services/google_ads_service.proto:317:10: Parsing error at `{ post : "/v18/customers/{customer_id=*}/googleAds:search" bo

This is how it looks:

rpc Search(SearchGoogleAdsRequest) returns (SearchGoogleAdsResponse) {
  option (google.api.http) = {
    post: "/v18/customers/{customer_id=*}/googleAds:search"
    body: "*"
  };
  option (google.api.method_signature) = "customer_id,query";
}

[smondet]

Same error with opam pin add ocaml-protoc "https://github.com/mransan/ocaml-protoc.git#br-4.0"