Hi mandympkong-yaho,
I appreciate you reaching out to us here. I've taken the liberty to pull up the Inventory Valuation Detail report from my end, without concerns. If you've cleared cache on your browser and received the same message, I suggest trying another browser, such as Firefox, Edge, Google Chrome, or Safari. I also agree with the recommendation provided by 4Gal, to see if you experience the same outcome in a private/incognito window.
Should the issue persist, please don't hesitate to contact our Customer Care team at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST. They would be happy to work with you in real time and ensure you're able to access the report without delay!
Feel free to touch base with us again, if any other questions or concerns should arise. We are here for you!