Hi @jammy — welcome to the Figma Forum, and thanks for flagging this.
I did a bit of digging, and based on the error message you shared, I’ve found a couple of things that might help:
Quick fix: In my research, updating the body text font and moving the content into a new file allowed the site to publish successfully for others in a similar scenario — this could be worth trying while the team continues to investigate.
Longer-term: Our engineering team is aware of the issue associated with this error message and actively working on improvements behind the scenes. If the solution above doesn’t work out for your website, our Product Support team can take a closer look at the file itself.