[2.4.1] Constructing Trade Post blocks nomad capital

[Koa Ka Na Niolo]

When a province is building a trade post and you try to move your capital to that province, you are told that you can't move your capital there since the province doesn't have an empty primary holding (it does). If the trade post is finished however you can move your capital.

Spoiler

 

[Servancour]

I was able to reproduce your issue without any difficulties. I'll file a report for it.

Cheers for reporting!