Undefined SSL object

Hi community,

when doing imapsync to my dovecot server (Host2) I get the following

Host2 capability before authentication: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN AUTH DEBUG: .../IO/Socket/SSL.pm:1117: global error: Undefined SSL object Host2: Socket successfuly converted to SSL

Beside this message all works fine. What is it? SSL setting? How to overcome the message?

Greetings, Frank