diff --git a/CHANGELOG.md b/CHANGELOG.md
index d21d8c8ff..600169ff8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## next deploy
 
+- Fix a bug: Unable to import accounts from SSO when the transformation modal was opened but leaved empty
+
 ## v5.4.12 2022 July 06
 
 - Fix a bug: Gender, Address and Birthday are not mapped properly from SSO (#365)
diff --git a/lib/omni_auth/data_mapping/base.rb b/lib/omni_auth/data_mapping/base.rb
index b6286721a..7d43c7d07 100644
--- a/lib/omni_auth/data_mapping/base.rb
+++ b/lib/omni_auth/data_mapping/base.rb
@@ -13,7 +13,7 @@ module OmniAuth::DataMapping
 
       def map_transformation(transformation, raw_data)
         value = nil
-        transformation['mapping'].each do |m|
+        transformation['mapping']&.each do |m|
           if m['from'] == raw_data
             value = m['to']
             break