2019-05-22 10:44:36.407 [critical] <0.345.0>@gen_mod:start_module:212 Problem starting the module mod_http_upload for host welcomeitalia.it
 options: [{docroot,<<"/home/ejabberd/upload">>},
           {put_url,<<"https://wh-chat:5444/upload">>},
           {access,local},
           {max_size,25000000},
           {thumbnail,false},
           {file_mode,420},
           {dir_mode,484}]
 error: {error,{already_started,<0.500.0>}}
[{gen_mod,start_module,4,[{file,"src/gen_mod.erl"},{line,203}]},
 {lists,foreach,2,[{file,"lists.erl"},{line,1338}]},
 {gen_mod,start_link,0,[{file,"src/gen_mod.erl"},{line,79}]},
 {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}]}]
2019-05-22 10:44:36.408 [critical] <0.345.0>@gen_mod:maybe_halt_ejabberd:294 ejabberd initialization was aborted because a module start failed.