About diplomacy, please help me.

[universelau]

Hi,

I complete end of storyline campaign (the siege of Kock ) + talk to mayor of thorn , diplomacy still not appear in map (in youtube, I see there is policy key in map).

When I talk to mayor of thorn, after complete the story.
The game story is restarted again but my hero level still is level 22-23.
Is it a bug?

How can I make diplomacy after completing game story and talking
to mayor of thorn.

Please help.