'mapreduce_nif_not_loaded' at ./cluster_run on ubuntu-18.04

[ns_server:info,2018-09-20T17:40:56.095+01:00,n_0@127.0.0.1:ns_couchdb_port<0.215.0>:ns_port_server:log:226]ns_couchdb<0.215.0>: {"Kernel pid terminated",application_controller,"{application_start_failure,ns_couchdb,{{shutdown,{failed_to_start_child,cb_couch_sup,{shutdown,{failed_to_start_child,couch_app,{'EXIT',{{badmatch,{error,{shutdown,{failed_to_start_child,couch_secondary_services,{shutdown,{failed_to_start_child,spatial_view_manager,{mapreduce_nif_not_loaded,[{erlang,nif_error,[mapreduce_nif_not_loaded],[]},{mapreduce,set_timeout,1,[{file,\"/home/paolo/source_temp/couchdb/src/mapreduce/mapreduce.erl\"},{line,78}]},{couch_set_view,init,1,[{file,\"/home/paolo/source_temp/couchdb/src/couch_set_view/src/couch_set_view.erl\"},{line,911}]},{gen_server,init_it,2,[{file,\"gen_server.erl\"},{line,365}]},{gen_server,init_it,6,[{file,\"gen_server.erl\"},{line,333}]},{proc_lib,init_p_do_apply,3,[{file,\"proc_lib.erl\"},{line,247}]}]}}}}}}},[{couch_server_sup,start_server,1,[{file,\"/home/paolo/source_temp/couchdb/src/couchdb/couch_server_sup.erl\"},{line,102}]},{supervisor,do_start_child,2,[{file,\"supervisor.erl\"},{line,365}]},{supervisor,start_children,3,[{file,\"supervisor.erl\"},{line,348}]},{supervisor,init_children,2,[{file,\"supervisor.erl\"},{line,314}]},{gen_server,init_it,2,[{file,\"gen_server.erl\"},{line,365}]},{gen_server,init_it,6,[{file,\"gen_server.erl\"},{line,333}]},{proc_lib,init_p_do_apply,3,[{file,\"proc_lib.erl\"},{line,247}]}]}}}}}},{ns_couchdb,start,[normal,[]]}}}"}

[ns_server:error,2018-09-20T17:40:56.103+01:00,n_0@127.0.0.1:wait_link_to_couchdb_node<0.220.0>:ns_server_nodes_sup:do_wait_link_to_couchdb_node:171]ns_couchdb_port(<0.215.0>) died with reason {abnormal,1}