Unable to load DBIx::SearchBuilder database handle for pg

hi guys please i need help
im trying to install request tracker 4 on centos 7 using postgresql
when i type the command

/opt/rt4/sbin/rt-server

To start the first run installation instance
i get the output

[32692] [Thu Aug 22 12:49:40 2019] [critical]: Unable to load DBIx::SearchBuilder database handle for ‘Pg’.
Perhaps you’ve picked an invalid database type or spelled it incorrectly.
Bareword “mysql” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
Bareword “postgres” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
BEGIN not safe after errors–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 585.
Compilation failed in require at (eval 230) line 2.
…propagated at /usr/share/perl5/base.pm line 84.
BEGIN failed–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle/Pg.pm line 9.
Compilation failed in require at /opt/rt4/sbin/…/lib/RT/Handle.pm line 89. (/opt/rt4/sbin/…/lib/RT.pm:408)
[32692] [Thu Aug 22 12:49:40 2019] [critical]: Unable to load DBIx::SearchBuilder database handle for ‘Pg’.
Perhaps you’ve picked an invalid database type or spelled it incorrectly.
Bareword “mysql” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
Bareword “postgres” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
BEGIN not safe after errors–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 585.
Compilation failed in require at (eval 230) line 2.
…propagated at /usr/share/perl5/base.pm line 84.
BEGIN failed–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle/Pg.pm line 9.
Compilation failed in require at /opt/rt4/sbin/…/lib/RT/Handle.pm line 89.
Compilation failed in require at /opt/rt4/sbin/rt-server line 94. (/opt/rt4/sbin/…/lib/RT.pm:408)
Unable to load DBIx::SearchBuilder database handle for ‘Pg’.
Perhaps you’ve picked an invalid database type or spelled it incorrectly.
Bareword “mysql” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
Bareword “postgres” not allowed while “strict subs” in use at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 78.
BEGIN not safe after errors–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle.pm line 585.
Compilation failed in require at (eval 230) line 2.
…propagated at /usr/share/perl5/base.pm line 84.
BEGIN failed–compilation aborted at /usr/local/share/perl5/DBIx/SearchBuilder/Handle/Pg.pm line 9.
Compilation failed in require at /opt/rt4/sbin/…/lib/RT/Handle.pm line 89.
Compilation failed in require at /opt/rt4/sbin/rt-server line 94.

i dont even know where to start please any idea??
im new in centos7

If you run make testdeps do you have all the Perl dependencies?

yes i do
i did it and i have all the dependencies