error preparing the installation

Hello! I've installed OpenCore on a few machines. This is my first one with Sequoia on a 20121 iMac air. Im getting this weird error when starting the installation. Anyone seen this before?

https://preview.redd.it/xjqwlyar3l3e1.png?width=375&format=png&auto=webp&s=1e3cfbf6c5de23b8b549d86d05aa61fbdef25090