errors when sending to localhost

[fm]

I am sending messages to two users on a server on my local machine.
messages come but there are errors in the console.
if you send a message to only one user, then there is no error.

$ echo -e "test 123" | sendxmpp --tls --tls-ca-path "/etc/ssl/certs/localhost.pem" "userone@localhost" "usertwo@localhost"
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/XML/Stream.pm line 1439.
Use of uninitialized value in hash element at /usr/share/perl5/XML/Stream.pm line 1440.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/XML/Stream.pm line 1440.
Use of uninitialized value in hash element at /usr/share/perl5/XML/Stream.pm line 1443.
Use of uninitialized value in numeric eq (==) at /usr/share/perl5/XML/Stream.pm line 1443.
Use of uninitialized value in hash element at /usr/share/perl5/XML/Stream.pm line 1443.
Use of uninitialized value within %status in numeric eq (==) at /usr/share/perl5/XML/Stream.pm line 1506.
Use of uninitialized value in subtraction (-) at /usr/share/perl5/XML/Stream.pm line 1507.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/XML/Stream.pm line 1669.
Use of uninitialized value in numeric eq (==) at /usr/share/perl5/XML/Stream.pm line 1673.

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sendxmpp : version 1.24
OS : Ubuntu 20.04.1 LTS
Arch : x86_64 (64 Bit)
Kernel : 5.4.0-1029-oracle
perl : 5.30.0 built for x86_64-linux-gnu-thread-multi