Error. Failed to submit hashrate...

I'm mining with Linux Mint and an 'msi R7950 Twin Frozer' video card. I'm getting to the following errors when I try to mine.

Failed to submit hashrate.
Dynamic exception type: jsonrpc::JsonRpcException
std::exception::what: Exception -32003 : Client connector error: libcurl error: 28 -> Operation timed out

JSON-RPC problem. Probably couldn't connect. Retrying in 1...

Any ideas? Thanks for any and all replies.