Hey Daniel,
Can you explain the steps for how you get this error? SCSS compilation is not related to sellacious at all. These types of files and compilation are available in helix ultimate, please check their support.
Thank you & Stay Safe
Thanks for answer. This happing when I do a update from sellacious 2.0.0beta1 to beta 3, then I get this error on the frontend. You can check the url. At the install I get follow error, see attachments. I use this template: Squick-v2.0