auto complete does not work

[kafussl]

Hello,
I configured my .zshrc file as stated in the manual (with fpath before and after autoload and compinit)

# autocomplete for timetrap https://github.com/samg/timetrap
fpath=(/var/lib/gems/2.5.0/gems/timetrap-1.15.1/completions/zsh $fpath)
autoload -U compinit
compinit

But when I try auto complete with tab, the following error is written instantly in the shell
t s ......No such file or directory - sqlite3

Probably a sqlite3 problem but I couldn't find any hints how to solve the problem. The database as written in the config file exists. Any hints appreciated.

Config file on my xubuntu

database_file: "/home/xxx/.timetrap.db"
round_in_seconds: 900
append_notes_delimiter: " "
formatter_search_paths:
- "/home/xxx/.timetrap/formatters"
default_formatter: text
auto_sheet: dotfiles
auto_sheet_search_paths:
- "/home/xxx/.timetrap/auto_sheets"
default_command: 
auto_checkout: false
require_note: false
note_editor: false
week_start: Monday

Thanks in advance