If you're using the save system, make sure you've added a DialogueSystemSaver component. Also inspect the Dialogue Manager GameObject and ensure that Persistent Data Settings > Initialize New Variables is ticked.
If you're using the save system, make sure you've added a DialogueSystemSaver component. Also inspect the Dialogue Manager GameObject and ensure that Persistent Data Settings > Initialize New Variables is ticked.
Unfortunately, the two items you mentioned are already applied.
At first, Let me check if I can reproduce this in a smaller environment.