Install fts-xapian plugin on Ubuntu 18.0.4 -- 2

I have Plesk Obsidian Web Admin Edition Version 18.0.34 The Plesk uses Dovecot as IMAP/POP3 server. The Plesk is installed on Ubuntu 18.0.4. I need to install dovecot plugin fts-xapian [login to view URL] On the end you will need to send document which describes all steps on how you accomplished installation. I tried to install it by myself but unsucessfully. Looking for someone who has experience with Dovecot. I get stuck on: Error: Couldn't load required plugin /usr/lib/dovecot/modules/[login to view URL]: Module is for different ABI version [login to view URL](2.3.7.2) (we have [login to view URL](2.3.13)) Conflict in ABI version Note: we can't separate the dovecot from the Plesk.