Updated erorr message when project limit is zero

When the project limit is zero & the user tries to create a project, the error displayed is now 'Personal project creation is not allowed. Please contact your administrator with questions'

Closes #17691

app/models/project.rb

@@ -431,7 +431,13 @@ class Project < ActiveRecord::Base
 
   def check_limit
     unless creator.can_create_project? or namespace.kind == 'group'
-      self.errors.add(:limit_reached, "Your project limit is #{creator.projects_limit} projects! Please contact your administrator to increase it")
+      projects_limit = creator.projects_limit
+
+      if projects_limit == 0
+        self.errors.add(:base, "Personal project creation is not allowed. Please contact your administrator with questions")
+      else
+        self.errors.add(:base, "Your project limit is #{projects_limit} projects! Please contact your administrator to increase it")
+      end
     end
   rescue
     self.errors.add(:base, "Can't check your ability to create project")