The error message includes "🔗 [Related URL]([object Object])", which is probably a bug in PR Preview itself. I'm not sure if the HTML Diff Service rate limit is PR Preview actually sending too many requests or the Diff Service being too restrictive.
See w3ctag/privacy-principles#419 and https://github.com/w3ctag/privacy-principles/pull/417.
The error message includes "🔗 [Related URL]([object Object])", which is probably a bug in PR Preview itself. I'm not sure if the HTML Diff Service rate limit is PR Preview actually sending too many requests or the Diff Service being too restrictive.