grpcurl -plaintext -d '{"block_height": 24000000}' localhost:9090 remote.ETHBACKEND/Block
ERROR:
  Code: Unknown
  Message: panic caught: runtime error: invalid memory address or nil pointer dereference

goroutine 5508559 [running]:
github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/recovery.recoverFrom({0x3c91b70?, 0xc40c3dcc90?}, {0x2d48b20, 0x5841f40}, 0x4720e5?)
	github.com/grpc-ecosystem/go-grpc-middleware/[email protected]/interceptors/recovery/interceptors.go:57 +0x65
github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/recovery.UnaryServerInterceptor.func1.1()
	github.com/grpc-ecosystem/go-grpc-middleware/[email protected]/interceptors/recovery/interceptors.go:30 +0x67
panic({0x2d48b20?, 0x5841f40?})
	runtime/panic.go:787 +0x132
github.com/erigontech/erigon/node/gointerfaces.ConvertH256ToHash(...)
	github.com/erigontech/erigon/node/gointerfaces/type_utils.go:51
github.com/erigontech/erigon/node/privateapi.(*EthBackendServer).Block(0xc1c02c3b00, {0x3c91b70, 0xc40c3dcc90}, 0xc2d0ca34c0)
	github.com/erigontech/erigon/node/privateapi/ethbackend.go:329 +0xd2
github.com/erigontech/erigon/node/gointerfaces/remoteproto._ETHBACKEND_Block_Handler.func1({0x3c91b70?, 0xc40c3dcc90?}, {0x301ca40?, 0xc2d0ca34c0?})
	github.com/erigontech/erigon/node/gointerfaces/remoteproto/ethbackend_grpc.pb.go:688 +0xcb
github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/recovery.UnaryServerInterceptor.func1({0x3c91b70?, 0xc40c3dcc90?}, {0x301ca40?, 0xc2d0ca34c0?}, 0x44a8e5?, 0x78?)
	github.com/grpc-ecosystem/go-grpc-middleware/[email protected]/interceptors/recovery/interceptors.go:34 +0x8a
github.com/erigontech/erigon/node/gointerfaces/remoteproto._ETHBACKEND_Block_Handler({0x3239800, 0xc1c02c3b00}, {0x3c91b70, 0xc40c3dcc90}, 0xc2d0ca4900, 0xc1553332c0)
	github.com/erigontech/erigon/node/gointerfaces/remoteproto/ethbackend_grpc.pb.go:690 +0x143
google.golang.org/grpc.(*Server).processUnaryRPC(0xc1195d4908, {0x3c91b70, 0xc40c3dcc00}, 0xc2cbf9d040, 0xc1557821e0, 0x58a2aa8, 0x0)
	google.golang.org/[email protected]/server.go:1428 +0x11e7
google.golang.org/grpc.(*Server).handleStream(0xc1195d4908, {0x3c93348, 0xc2cc8551e0}, 0xc2cbf9d040)
	google.golang.org/[email protected]/server.go:1832 +0xdc6
google.golang.org/grpc.(*Server).serveStreams.func2.1()
	google.golang.org/[email protected]/server.go:1063 +0x7f
created by google.golang.org/grpc.(*Server).serveStreams.func2 in goroutine 5508665
	google.golang.org/[email protected]/server.go:1074 +0x11d