How do I fix this? I followed the steps for debugging on wt:Portal:Cloud_VPS/Admin/Runbooks/Cloud VPS alert Puppet failure on and got the same error. I couldn't find any instructions for it on that page.

Full log:
sebastian-berlin-wmse@producer:~$ sudo run-puppet-agent
2024-05-22 09:28:12.274041 WARN  puppetlabs.facter - locale environment variables were bad; continuing with LANG=C LC_ALL=C
2024-05-22 09:28:13.088451 WARN  puppetlabs.facter - locale environment variables were bad; continuing with LANG=C LC_ALL=C
Info: Using environment 'production'
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Loading facts
Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: Error while evaluating a Resource Statement, Class[Memcached]: parameter 'memcached_user' expects a String value, got Undef (file: /srv/puppet_code/environments/production/modules/profile/manifests/simplelamp2.pp, line: 32, column: 5) on node producer.wikispeech.eqiad1.wikimedia.cloud
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

Sebastian Berlin
Utvecklare/Developer
Wikimedia Sverige (WMSE)

E-post/E-Mail: sebastian.berlin@wikimedia.se
Telefon/Phone: (+46) 0707 - 92 03 84


---------- Forwarded message ---------
From: root <root@producer.wikispeech.eqiad1.wikimedia.cloud>
Date: Wed, 22 May 2024 at 10:15
Subject: [Cloud VPS alert][wikispeech] Puppet failure on producer.wikispeech.eqiad1.wikimedia.cloud (172.16.0.200)
To: <sebastian.berlin@wikimedia.se>



Puppet is having issues on the "producer.wikispeech.eqiad1.wikimedia.cloud (172.16.0.200)" instance in project
wikispeech in Wikimedia Cloud VPS.

Puppet is running with failures.

Working Puppet runs are needed to maintain instance security and logins.
As long as Puppet continues to fail, this system is in danger of becoming
unreachable.

You are receiving this email because you are listed as member for the
project that contains this instance.  Please take steps to repair
this instance or contact a Cloud VPS admin for assistance.

If your host is expected to fail puppet runs and you want to disable this
alert, you can create a file under /.no-puppet-checks, that will skip the checks.

You might find some help here:
    https://wikitech.wikimedia.org/wiki/Portal:Cloud_VPS/Admin/Runbooks/Cloud_VPS_alert_Puppet_failure_on

For further support, visit #wikimedia-cloud on libera.chat or
<https://wikitech.wikimedia.org>

Some extra info follows:
---- Last run summary:
application:
  converged_environment: production
  initial_environment: production
  run_mode: agent
changes:
  total: 0
events:
  failure: 0
  success: 0
  total: 0
resources:
  changed: 0
  corrective_change: 0
  failed: 0
  failed_to_restart: 0
  out_of_sync: 0
  restarted: 0
  scheduled: 0
  skipped: 0
  total: 0
time:
  fact_generation: 0.5950437020510435
  last_run: 1716364257
  plugin_sync: 0.8315697535872459
  startup_time: 0.862627795
  total: 4.96828438
version:
  config: null
  puppet: 7.23.0


---- Failed resources if any:

  No failed resources.

--- Last run log:

ERR: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: Error while evaluating a Resource Statement, Class[Memcached]: parameter 'memcached_user' expects a String value, got Undef (file: /srv/puppet_code/environments/production/modules/profile/manifests/simplelamp2.pp, line: 32, column: 5) on node producer.wikispeech.eqiad1.wikimedia.cloud
WARNING: Not using cache on failed catalog
ERR: Could not retrieve catalog; skipping run

---- Exceptions that happened when running the script if any:
  No exceptions happened.