An update: I found an RSS validator online, and validated this RSS
https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Frss.webcoupon.us%2FLiquibil_Business_Solution_1.rss
However, the problem persists
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zhuzh1 on "RSS feed is having problem, but I can't tell what's wrong"
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