The source provided could not be parsed as a value list

The following error message:

The source provided ([...]) could not be parsed as a value list.

can happen when the wrong syntax is passed to the FontFace API.

Older versions on Chrome, including Chrome 104 which runs in Remotion Lambda does not support the FontFace syntax without quotes.

❌ Without quotes
txt
src: url(font.woff2) format(woff2);

✅ With quotes
txt
src: url('font.woff2') format('woff2');

To fix the issue, always include quotes.
Use @remotion/fonts to use an abstraction that helps you avoid this mistake.