[Freeswitch-users] Verto communicator errors

I installed verto communicator After ext. registration trying to call but as result have bunch of errors: whats wrong ? 2016-04-20 18:52:24.135161 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.135161 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.135161 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.155150 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.455157 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.455157 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }] 2016-04-20 18:52:24.455157 [ALERT] mod_verto.c:604 WRITE 10.110.11.16:59672 [{ "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": null }]