[Koha] zebra search is not working

[Arayik Manukyan]

Dear List,

Recently we installed Koha 3.20.14 on ubuntu - tarball but zebra 
indexing is not working .

  After  running such command  we have got this result

****************************************************************************

koha at host-93-94-220-102:/usr/share/koha/bin/migration_tools$ 
./rebuild_zebra.pl -b -r -v
Warning: program compiled against libxml 209 using older 207
Warning: XML::LibXML compiled against libxml2 20901, but runtime libxml2 
is older 20708
Warning: program compiled against libxml 209 using older 207
Warning: XML::LibXSLT compiled against libxslt 10128, but runtime 
libxslt is older 10126
Zebra configuration information

================================
Zebra biblio directory      = /var/lib/koha/zebradb/biblios
Zebra authorities directory = /var/lib/koha/zebradb/authorities
Koha directory              = /usr/share/koha/intranet/cgi-bin
Lockfile                    = /var/lock/koha/zebradb/rebuild/rebuild..LCK
BIBLIONUMBER in :     999$c
BIBLIOITEMNUMBER in : 999$d
================================
skipping authorities
====================
exporting biblio
====================
1..
Records exported: 3
====================
REINDEXING zebra
====================
====================
CLEANING
====================
Please, help to solve this problem.

Thanks, Araik