Error in Improving Compatibility with Browser Fallbacks

Error in Improving Compatibility with Browser Fallbacks
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#1

Can someone kindly review the error message in this snapshot and tell me what I did wrong?

#2

Please upload your code snippets instead of screenshots.

Instead of giving the same style above the line with the same variable. You need to give it a default value of red so that it can fall back to it if variables don’t work.

#3

Ok, thanks. Your advice worked.