Console error, but seems to function without issue

Hey I'm getting an error (see screenshot: https://share.cleanshot.com/6M8TY8pC) in the console log but everything seems to working fine. Is this something I should be worried about?

Seems to be related to variant selection based on my limited understanding of reading the error. Happens on the product page, e.g. here: https://makebo-theme.myshopify.com/products/beautiful-authentic-leather-case