Handle errors in the "/" endpoint

src/routes/main.cr

@@ -33,10 +33,15 @@ class MainRouter < Router
     end
 
     get "/" do |env|
+      begin
         titles = @context.library.titles
         username = get_username env
         percentage = titles.map &.load_percetage username
         layout "index"
+      rescue e
+        @context.error e
+        env.response.status_code = 500
+      end
     end
 
     get "/book/:title" do |env|