--- discourse-ldap-auth.orig/gems/2.3.3/gems/omniauth-ldap-1.0.5/lib/omniauth/strategies/ldap.rb        2018-04-02 17:58:36.830909997 +0200
+++ discourse-ldap-auth/gems/2.3.3/gems/omniauth-ldap-1.0.5/lib/omniauth/strategies/ldap.rb     2018-04-02 19:17:51.903732202 +0200
@@ -27,7 +27,8 @@

       def request_phase
         OmniAuth::LDAP::Adaptor.validate @options
-        f = OmniAuth::Form.new(:title => (options[:title] || "LDAP Authentication"), :url => callback_path)
+       #Patch applied: https://github.com/omniauth/omniauth-ldap/pull/16
+        f = OmniAuth::Form.new(:title => (options[:title] || "LDAP Authentication"), :url => callback_url)
         f.text_field 'Login', 'username'
         f.password_field 'Password', 'password'
         f.button "Sign In"