Cannot read properties of undefined (reading 'map')

[StefanoGiu]

My Home Assistant version: 2021.9.7

Layout-card version (FROM BROWSER CONSOLE): 2.3.1

# The least ammount of code possible to reproduce my error

6900 lines. The error started popping up after I upgraded the version of this js.

# End of code

layout-card.js:61 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'map') at HTMLElement._createCards (layout-card.js:61) at async HTMLElement.updated (layout-card.js:61)

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