Raise error when attempting to render, but rendering was disabled

lib/rodauth.rb

@@ -3,6 +3,8 @@
 require 'securerandom'
 
 module Rodauth
+  class ConfigurationError < StandardError; end
+
   def self.lib(opts={}, &block) 
     require 'roda'
     c = Class.new(Roda)

lib/rodauth/features/base.rb

@@ -930,6 +930,10 @@ def _template_opts(opts, page)
     end
 
     def _view(meth, page)
+      unless scope.respond_to?(meth)
+        raise ConfigurationError, "attempted to render a built-in view/email template (#{page.inspect}), but rendering is disabled"
+      end
+
       scope.send(meth, _view_opts(page))
     end
   end

spec/rodauth_spec.rb

@@ -856,6 +856,14 @@ def foo
     c.ancestors.map(&:to_s).wont_include 'Roda::RodaPlugins::RouteCsrf::InstanceMethods'
   end
 
+  it "raises error when rendering is disabled" do
+    c = Class.new(Roda)
+    c.plugin(:rodauth, :render=>false){}
+    rodauth = c.new({}).rodauth
+    error = proc{rodauth.render("login")}.must_raise Rodauth::Error
+    error.message.must_include "attempted to render"
+  end
+
   it "should inherit rodauth configuration in subclass" do
     auth_class = nil
     no_freeze!