With the Season 7 update, I keep getting this Fenris error and I can’t play the game for more than 10 minutes. I tried all the solutions I googled but I keep getting the error.
Please someone help.
Try to increase your virtual memory and the swap file, it helped me the game does not crash.
I receive the error every 1h and 20 minutes - it’s like clockwork.
And that’s been the case on and off since the game’s launch - some seasons it works ok, others it crashes with the Fenris error at the exact mentioned time interval…
And in the last 3-4 seasons I’ve encountered it in each one…
Increasing the swap size as mentioned here, did nothing for me - increased it to 50GB and still received the error.
My rig is pretty good (7800X3D, 32GB RAM, RTX 3090 24GB VRAM, 4x M.2 NVMe PCIE Gen4 SSD’s, Win11 OS and I keep the Nvidia drivers updated with every new release etc).
I encountered a very similar crash after 1h or so in Path Of Exile 2 - there i’ve fixed it by switching from DirectX12 to Vulkan - but in Diablo 4 there is no Vulkan option…
Aside from those 2 games I have ZERO crashes in ANY other titles no matter how new or old… so it’s cleary not the rig at fault here.
However last night before turning in, I had the “bright” idea to put the game in window mode (instead of the default window full screen).
Today I’ve played for 2,5 hours with it like that, and encountered no error…
I have no clue why that works, but it does at least for me…
Give it a try, maybe it works for you too 
Cheers!
EDIT After over 6 hours of continuous running, it still works, no crash encountered - running in a window seems to solve the Fenris problem 
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