small fix for page

app/models/journal_paper.rb

@@ -72,7 +72,7 @@ class JournalPaper
   def self.get_plugin_datas_to_member(datas)
     page = Page.where(:module => "personal_journal").first rescue nil
 
-    if page.custom_string_field == "table"
+    if !page.nil? && page.custom_string_field == "table"
       fields_to_show = [
         "paper_title",
         "journal_title",