It seems that the script columns_setting.js is missing while it is required in the subtask_list_columns/index.html, so the fields cannot be added/move in the config
Bug fixed.
All scripts was internal in file index.rb, but we forgot remove reference on nonexistent file "columns_setting.js".
Thank you for your comment!
It seems that the script columns_setting.js is missing while it is required in the subtask_list_columns/index.html, so the fields cannot be added/move in the config