$ rpm -q --qf '%{EVR}\n' ejabberd                                                                                                                
18.12.1-alt1                                                                                                                                                  
$ rpm -q --qf '%{EVR}\n' erlang                                                                                                                  
1:21.2.4-alt3                                                                                                                                                 

$ tail -F /var/log/ejabberd/ejabberd.log
2019-02-28 01:15:45.952 [error] <0.557.0>@eldap:connect_bind:1073 LDAP connection to ldap.server:636 failed: TLS Alert: handshake failure                 
2019-02-28 01:15:45.955 [error] <0.558.0>@eldap:connect_bind:1073 LDAP connection to ldap.server:636 failed: TLS Alert: handshake failure                 
2019-02-28 01:15:45.955 [info] <0.590.0> TLS client: In state hello received SERVER ALERT: Fatal - Handshake Failure                                          

2019-02-28 01:15:46.453 [debug] <0.557.0>@eldap:connect_bind:1051 Connecting to LDAP server at ldap.server:636 with options [{packet,asn1},{active,true},{k
eepalive,true},binary]                                                                                                                                        
2019-02-28 01:15:46.456 [debug] <0.558.0>@eldap:connect_bind:1051 Connecting to LDAP server at ldap.server:636 with options [{packet,asn1},{active,true},{k
eepalive,true},binary]                                                                                                                                        
2019-02-28 01:15:46.461 [info] <0.596.0> TLS client: In state hello received SERVER ALERT: Fatal - Handshake Failure                                          

This can be related: https://stackoverflow.com/questions/52637744/why-do-i-get-an-error-with-my-code-in-erlang-21-but-not-in-erlang-20