Which tool versions are you using?
SDK: v14.23.0
Platform: v24.x.x
Python: v3.12
Isolation mode: venv
Current Behavior
In the published app, when users create a new entity, they get this error message:
Entities that were created in the past still work fine, and if I copy them to make new entities, that also works.
When loading the development app (run viktor-cli start), I get this log:
Client log
2025-12-18 12:00:07.595 INFO : * * () * __ __ __ __ __ * () *
2025-12-18 12:00:07.595 INFO : * * /\ \ \ * / / | | | |/ / * * /\
2025-12-18 12:00:07.595 INFO : * /i\\ * \ \ / / | | | ' / * * /i\\ *
2025-12-18 12:00:07.595 INFO : * o/\\ * \ \/ / * | | | < * o/\\ *
2025-12-18 12:00:07.595 INFO : * ///\i\ * \ / | | | . \ * ///\i\ *
2025-12-18 12:00:07.595 INFO : * /*/o\\ * \/ * |_| |_|\_\ * /*/o\\
2025-12-18 12:00:07.595 INFO : * /i//\*\ _______ ____ _____ * /i//\*\ * *
2025-12-18 12:00:07.595 INFO : /o/*\\i\ |__ __| / __ \ | __ \ /o/*\\i\ *
2025-12-18 12:00:07.595 INFO : * //i//o\\\\ * | | | |* | | | |__) | //i//o\\\\ *
2025-12-18 12:00:07.595 INFO : * /*////\\\\i\* | | * | | | | | _ / * /*////\\\\i\ *
2025-12-18 12:00:07.595 INFO : * //o//i\\*\\\ * | | | |__| | | | \ \ //o//i\\*\\\ *
2025-12-18 12:00:07.595 INFO : * * || * |_| \____/ |_| *\_\ * || *
2025-12-18 12:00:07.595 INFO : VIKTOR connector : v6.7.1
2025-12-18 12:00:07.595 INFO : VIKTOR CLI : v0.45.0
2025-12-18 12:00:07.595 INFO : VIKTOR SDK : v14.23.0
2025-12-18 12:00:07.629 INFO : Connecting to vinci.viktor.ai...
2025-12-18 12:00:08.591 INFO : Connection is established (use Ctrl+C to close)
2025-12-18 12:00:08.591 INFO :
2025-12-18 12:00:08.591 INFO : Navigate to the link below to see your app in the browser
2025-12-18 12:00:08.591 INFO : https://vinci.viktor.ai/workspaces/342/app
2025-12-18 12:00:08.591 INFO :
2025-12-18 12:00:08.591 INFO : Loading app...
2025-12-18 12:00:12.718 INFO : Job (uid: 844453) received - EntityType: Folder - call: parametrization
2025-12-18 12:00:12.718 WARNING : Job (uid: 844453) discarded because app is (re)loading
2025-12-18 12:00:12.897 INFO : App code loaded, waiting for jobs...
2025-12-18 12:00:13.902 INFO : Job (uid: 844454) received - EntityType: Folder - call: parametrization
2025-12-18 12:00:14.041 INFO : Job (uid: 844454) started
2025-12-18 12:00:14.041 INFO : Job (uid: 844454) completed successfully in 0ms
2025-12-18 12:00:15.988 INFO : Job (uid: 844455) received - EntityType: Agency - call: parametrization
2025-12-18 12:00:16.138 INFO : Job (uid: 844455) started
2025-12-18 12:00:16.139 INFO : Job (uid: 844455) completed successfully in 2ms
2025-12-18 12:00:18.517 INFO : Job (uid: 844456) received - EntityType: Predalle - call: parametrization
2025-12-18 12:00:18.659 INFO : Job (uid: 844456) started
2025-12-18 12:00:18.662 ERROR : Exception is raised
Traceback (most recent call last):
File "viktor_connector\\connector.pyx", line 370, in connector.Job.execute
File "viktor\\core.pyx", line 2100, in viktor.core._handle_job
File "viktor\\core.pyx", line 2033, in viktor.core._handle_job._handle_parametrization
File "viktor\\parametrization.pyx", line 4026, in viktor.parametrization.Parametrization._generate
File "viktor\\parametrization.pyx", line 4364, in viktor.parametrization.Step._generate
File "viktor\\parametrization.pyx", line 4105, in viktor.parametrization._Group._generate
File "viktor\\parametrization.pyx", line 4105, in viktor.parametrization._Group._generate
File "viktor\\parametrization.pyx", line 4105, in viktor.parametrization._Group._generate
File "viktor\\parametrization.pyx", line 1065, in viktor.parametrization.DynamicArray._generate
File "viktor\\parametrization.pyx", line 2221, in viktor.parametrization._SelectField._generate
File "viktor\\parametrization.pyx", line 2333, in viktor.parametrization._SelectField._handle_options_constraint
File "viktor\\parametrization.pyx", line 2262, in viktor.parametrization._SelectField._sanitize_and_check_options
TypeError: 'NoneType' object is not iterable
2025-12-18 12:00:18.669 WARNING : Job (uid: 844456) completed in 9ms with errors
Expected Behavior
In the past I had no problem creating entities and never got this error message. My other apps don’t have this problem.