Error: Class referenced in the manifest, org.apache.tvm.tvmrpc.RPCWatchdogService, was not found in the project or the libraries

I was going to run Cross Compilation and RPC and then I followed these instructions, when excuting gradle clean build, I got a error like this

apps/android_rpc/app/src/main/AndroidManifest.xml:43: Error: Class referenced in the manifest, org.apache.tvm.tvmrpc.RPCWatchdogService, was not found in the project or the libraries [MissingClass]
          <service android:name=".RPCWatchdogService"

does anyone has met such an error? any cues would be highly appreciated.@ziheng

Sorry to bother you. I already fix this bug, the reason is I forgot to open some options related to RPC in config.cmake