Cannot install any ejabberd contrib module - ejabberd

Question

I'm trying to instal ejabberd-contrib modules. Using this guide,
However when I run ejabberdctl modules_update_specs nothing is returned.
And when I try install any of the individual modules:
ejabberdctl module_install mod_pottymouth
Failed RPC connection to the node ejabberd#localhost: {'EXIT',
{undef,
[{bitarray,new,
[16777216,false],
[]},
{etbloom,
'-bloom/3-lc$^0/1-0-',
2,
[{file,
"/var/lib/ejabberd/.ejabberd-modules/sources/ejabberd-contrib/mod_pottymouth/deps/etbloom/src/etbloom.erl"},
{line,77}]},
{etbloom,bloom,3,
[{file,
"/var/lib/ejabberd/.ejabberd-modules/sources/ejabberd-contrib/mod_pottymouth/deps/etbloom/src/etbloom.erl"},
{line,77}]},
{etbloom,sbf,4,
[{file,
"/var/lib/ejabberd/.ejabberd-modules/sources/ejabberd-contrib/mod_pottymouth/deps/etbloom/src/etbloom.erl"},
{line,98}]},
{bloom_gen_server,
init,1,
[{file,
"/var/lib/ejabberd/.ejabberd-modules/sources/ejabberd-contrib/mod_pottymouth/src/bloom_gen_server.erl"},
{line,28}]},
{gen_server,init_it,
2,
[{file,
"gen_server.erl"},
{line,374}]},
{gen_server,init_it,
6,
[{file,
"gen_server.erl"},
{line,342}]},
{proc_lib,
init_p_do_apply,3,
[{file,
"proc_lib.erl"},
{line,249}]}]}}
Commands to start an ejabberd node:
start Start an ejabberd node in server mode
debug Attach an interactive Erlang shell to a running ejabberd node
iexdebug Attach an interactive Elixir shell to a running ejabberd node
live Start an ejabberd node in live (interactive) mode
iexlive Start an ejabberd node in live (interactive) mode, within an Elixir shell
foreground Start an ejabberd node in server mode (attached)
ejabberdctl status
The node ejabberd#localhost is started with status: started
How can I fix this?

Answer 1

However when I run ejabberdctl modules_update_specs nothing is returned.
Then it probably worked correctly, otherwise it would have returned some error, and echo would return 1. Example that it worked correctly and created the path:
$ ejabberdctl modules_update_specs
$ echo $?
0
$ ls $HOME/.ejabberd-modules/
sources
And when I try install any of the individual modules:
Installing ANY module produces an error? For example, if you try installing mod_rest, does it work? Notice this reports a warning about documentation, which is not important:
$ ejabberdctl module_install mod_rest
/home/badlop/.ejabberd-modules/sources/ejabberd-contrib/mod_rest/src/mod_rest.erl:27: Warning: undefined callback function mod_doc/0 (behaviour 'gen_mod')
$ ls $HOME/.ejabberd-modules/
mod_rest sources
{'EXIT', {undef, [{bitarray,new,
Yes, this is a known problem when installing mod_pottymouth. The workaround for installing that module is described in the README.txt file of that module. I've followed those instructions now, and the module compiled and installed correctly.