Application - Postgresql fails to parse the data

/usr/lib/observium_agent/local# /usr/lib/observium_agent/local/postgresql.pl

<<<app-postgresql>>>

version:7.4

cCount:0

tDbs:0

tUsr:0

tHst:0

idle:0

select:0

update:0

delete:0

other:0

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 161.

xact_commit:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 162.

xact_rollback:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 163.

blks_read:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 164.

blks_hit:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 166.

tup_returned:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 167.

tup_fetched:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 168.

tup_inserted:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 169.

tup_updated:

Use of uninitialized value in concatenation (.) or string at /usr/lib/observium_agent/local/postgresql.pl line 170.

tup_deleted:

select version()

PostgreSQL 12.2 (Ubuntu 12.2-2.pgdg18.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0, 64-bit