This program was compiled against version 3.5.1 of the Protocol Buffer runtime library, which is not compatible with the installed version (3.15.6)

[Saucup]

[libprotobuf FATAL google/protobuf/stubs/common.cc:87] This program was compiled against version 3.5.1 of the Protocol Buffer runtime library, which is not compatible with the installed version (3.15.6). Contact the program author for an update. If you compiled the program yourself, make sure that your headers are from the same version of Protocol Buffers as your link-time library. (Version verification failed in "../modules/dnn/misc/caffe/opencv-caffe.pb.cc".)

I did not found where protobuf 3.5.1 is.

command "protoc --version" show: libprotoc 3.15.6