for help

[ndcc5]

2019-07-25T15:33:03.588+0800 ERROR modelx/modelx.go:454 switching new block {"error": "Generation signature's length differs from 64"}
github.com/PoC-Consortium/Nogrod/pkg/modelx.(*Modelx).MaybeSwitchOrNewBlock
/home/ubuntu/Nogrod/pkg/modelx/modelx.go:454
github.com/PoC-Consortium/Nogrod/pkg/modelx.(*Modelx).UpdateOrCreateNonceSubmission
/home/ubuntu/Nogrod/pkg/modelx/modelx.go:751
github.com/PoC-Consortium/Nogrod/pkg/pool.(*Pool).processSubmitNonceRequest
/home/ubuntu/Nogrod/pkg/pool/pool.go:268
github.com/PoC-Consortium/Nogrod/pkg/pool.(*Pool).serve.func1
/home/ubuntu/Nogrod/pkg/pool/pool.go:335
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:1995
github.com/throttled/throttled.(*HTTPRateLimiter).RateLimit.func1
/home/ubuntu/go/pkg/mod/github.com/throttled/[email protected]+incompatible/http.go:73
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:1995
net/http.(*ServeMux).ServeHTTP
/usr/local/go/src/net/http/server.go:2375
net/http.serverHandler.ServeHTTP
/usr/local/go/src/net/http/server.go:2774
net/http.(*conn).serve