Can't parse the '{{' s in the config file

[spacemoose]

Hi. Thanks for the dashboard. I'm using collectd version 5.7.0, and when I try start collectd with your configuration file, I get the errorl
Jan 27 10:15:00 localhost.localdomain collectd[7549]: plugin_load: plugin "memcached" successfully loaded. Jan 27 10:15:00 localhost.localdomain collectd[7549]: Error: Reading the config file failed! Jan 27 10:15:00 localhost.localdomain collectd[7549]: Read the syslog for details. Jan 27 10:15:00 localhost.localdomain collectd[7549]: {{|()}}
I'm able to use the dashboard by eliminating what i guess are the environment variable parsing sections of the config file, for example I replace:
#Interval {{ COLLECT_INTERVAL | default("10") }}
with
Interval 5

Can you provide me some guidance? Am I missing a parameter? Using too old a version of collectd?
Does parsing fail if the environment variable is not defined?