Translate the Rho error codes to a text message.
0 = `ERR_NONE` 1 = `ERR_NETWORK` 2 = `ERR_REMOTESERVER` 3 = `ERR_RUNTIME` 4 = `ERR_UNEXPECTEDSERVERRESPONSE` 5 = `ERR_DIFFDOMAINSINSYNCSRC` 6 = `ERR_NOSERVERRESPONSE` 7 = `ERR_CLIENTISNOTLOGGEDIN` 8 = `ERR_CUSTOMSYNCSERVER` 9 = `ERR_UNATHORIZED`