diff --git a/uploads/website_specific/cms_homesite/errorservice.csv b/uploads/website_specific/cms_homesite/errorservice.csv
index 1f999ad08dc3d15779aff447190a3ef70750a6f4..8f4513e2148a7383f56d6130fdbd7aca77376329 100644
--- a/uploads/website_specific/cms_homesite/errorservice.csv
+++ b/uploads/website_specific/cms_homesite/errorservice.csv
@@ -260,3 +260,5 @@ A system e-mail could not be sent,Your web server is unable to send e-mails.,"It
  - You are on a Linux server and there is no outgoing e-mail service on it (e.g. sendmail, postfix, qmail).","The system administrator should resolve the problem by making the correct [tt]php.ini[/tt] settings or setting up an e-mail server.
 
 You can try and work around the problem by configuring Composr to send e-mail through a different SMTP server using its own code (configure this under the Admin Zone, Setup Section, Configuration icon, 'Site options')."
+The necessary forum for this has not yet been created,You selected a forum in a configuration setting which does not exist.,"Addons which have configuration options involving forums might set an arbitrary forum ID which does not exist yet as its default. Or, you might have defined a forum which existed at one point but does not anymore.","Go into the configuration setting and change it to a forum which exists."
+A configuration option (xxx) which does not exist was referenced,Some code or template is trying to access the value of a configuration option which does not exist.,"This can happen when you mis-type the name of the configuration option. It can also happen if the addon containing the option is no-longer installed or was never installed (this is a bug and should be reported to the tracker).","Check to ensure you typed the configuration option name correctly and that it exists, e.g. a hook exists for it under [tt]hooks/systems/config[/tt]. You might also need to clear caches (template, self-learning, block) in Admin Zone > Tools > Cleanup tools."