the trait bound `MyObj: prost::message::Message` is not satisfied

the trait `prost::message::Message` is not implemented for `MyObj`

note: required by `actix_protobuf::ProtoBuf`rustc(E0277)
main.rs(47, 1): the trait `prost::message::Message` is not implemented for `MyObj`

error[E0599]: no method named `map_err` found for type `ProtoBufMessage<actix_web::HttpRequest<S>, _>` in the current scope
   --> actix-protobuf/src/lib.rs:103:14
    |
103 |               .map_err()
    |                ^^^^^^^
...
111 | / pub struct ProtoBufMessage<T, U>
112 | | where U: Message + Default,
113 | | {
114 | |     limit: usize,
...   |
117 | |     fut: Option<Box<Future<Item=U, Error=ProtoBufPayloadError>>>,
118 | | }
    | |_- method `map_err` not found for this
    |
    = note: the method `map_err` exists but the following trait bounds were not satisfied:
            `ProtoBufMessage<actix_web::HttpRequest<S>, _> : futures::Future`
            `&mut ProtoBufMessage<actix_web::HttpRequest<S>, _> : futures::Future`
            `&mut ProtoBufMessage<actix_web::HttpRequest<S>, _> : futures::Stream`
    = help: items from traits can only be used if the trait is implemented and in scope
    = note: the following traits define an item `map_err`, perhaps you need to implement one of them:
            candidate #1: `actix::ActorFuture`
            candidate #2: `actix::ActorStream`
            candidate #3: `futures::Future`
            candidate #4: `futures::Stream`
            candidate #5: `actix_net::service::ServiceExt`
            candidate #6: `actix_net::service::NewServiceExt`