The category from which you are trying to add pages does not exist, is invalid, or has more pages than the limit specified.
MediaWiki:Coll-api-addcategory-category-does-not-exist/en
The user you are trying to add does not exist.
MediaWiki:Ur-add-error-message-no-user/en
Category does not exist.
MediaWiki:Wikiforum-cat-not-found-text/en
The specified delivery list page or category does not exist.
MediaWiki:Massmessage-spamlist-doesnotexist/en
The thread you specified does not exist.
MediaWiki:Lqt nosuchthread/en
The filter you specified does not exist
MediaWiki:Abusefilter-edit-badfilter/en
The title you specified does not exist.
MediaWiki:Templatesandbox-title-not-exists/en
The revision you specified does not exist.
MediaWiki:Templatesandbox-revision-not-exists/en
The revision you specified does not exist.
MediaWiki:Compare-revision-not-exists/en
The user you are trying to view does not exist.
MediaWiki:Fanbox-userdoesnotexist/en
The user you are trying to view does not exist.
MediaWiki:Userboard noexist/en
The user you are trying to view does not exist.
MediaWiki:Ga-error-message-no-user/en
The user you are trying to view does not exist.
MediaWiki:G-error-message-no-user/en
Category $1 does not exist or is empty
MediaWiki:Randomincategory-nocategory/en
The specified user does not exist.
MediaWiki:Checkuser-user-nonexistent/en
The specified target does not exist.
MediaWiki:Checkuser-target-nonexistent/en
The specified initiator does not exist.
MediaWiki:Checkuser-initiator-nonexistent/en
The specified stat does not exist.
MediaWiki:Top-fans-bad-field-message/en
The file specified does not exist.
MediaWiki:Revdelete-no-file/en
Group does not exist or invalid
MediaWiki:Apierror-translate-invalidgroup/en
The specified user "$1" does not exist.
MediaWiki:Config-install-user-missing/en
The specified group $1 does not exist.
MediaWiki:Translate-mgs-invalid-group/en
The specified user ($1) does not exist
MediaWiki:Rest-nonexistent-user/en
The specified title ($1) does not exist
MediaWiki:Rest-nonexistent-title/en
The specified revision ($1) does not exist
MediaWiki:Rest-nonexistent-revision/en
