Unknown type encountered: horizontal stack

I have this problem After updating my has. Any ideas what can be the problem?
Thank you

I just upgraded to HassOS 4.15 and Iā€™m having the exact same issue. Did you manage to fix it?

Asked the same question on reddit and got an answer that fixed it. Here it is: https://www.reddit.com/r/homeassistant/comments/jmpgy4/_/gawmsyv

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