How to connect protobuf to Java?

Question

Java

There is a simple data structure in the proto file:
package tutorial;
option java_package = "com.example.tutorial";
option java_outer_classname = "mess";
message request {
required float a = 1;
required float b = 2;
required float c = 3;
}
message response {
optional float x = 1;
optional string mess = 2;
} I
connect the proto file to java:
import com.example.tutorial.mess;
and when compiling the Java file throws errors (58 pieces and all of them on ".\com\google\protobuf\Descriptors), here is an example of one of them:
.\com\google\protobuf\Descriptors.java:590: error: cannot fint symbols
public DescriptorProto toProto() { return proto; }
^
symbol: class DescriptorProto
location: class Descriptor
What could be causing this?