Ok so I've tried to start a new game as fast as I could,I've reached the cinematic telling us the story and all.

Suddenly I've seen an "Unity" crash, did not have enough time to see more on that window that closed after a second. I dont know if the crash is related to the original bug of this post, but just in case...

In my Windows (W10) event observer, I can notice the error, here is the problem (I'm french so i'll do my best to translate) :

Failing application's name : valheim;exe version : 2019.4.16.23406
Failing module : d3d11.dll, version: 10.0.19041.746
Execution code: 0xc0000005
"Décalage" d'erreur (I dont know how to translate, maybe "Error's shift"): 0x000000000012c370
Failing process id : 0x2b44

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Seeing "d3d11.dll", I'm thinking about DirectX ? I don't know, just trying to guess things.

Edit: Ok so I do reproduce everytime I start a new game after character creation. Here's the screenshot of unity crash : https://ibb.co/jTL6sJz