Fixed nil error on schedule page

app/controllers/application_controller.rb

@@ -572,7 +572,10 @@ class ApplicationController < LinguaFrancaApplicationController
 
 		@schedule.each do | day, data |
 			@schedule[day][:times] = data[:times].sort.to_h
-			@schedule[day][:locations][0] = :add if do_analyze || @schedule[day][:locations].empty?
+			if do_analyze || @schedule[day][:locations].empty?
+				@schedule[day][:locations] ||= []
+				@schedule[day][:locations][0] = :add
+			end
 
 			if do_analyze
 				data[:times].each do | time, time_data |