"Where's My Refund Tool Shows 'Currently Unavailable' Error Despite Correct Information Entry"

Been trying to check my refund status but the Where's My Refund tool keeps giving me issues. I went to sa.www4.irs.gov/wm to check my refund status, but I keep getting error messages. The site shows "We are sorry Where's My Refund is currently unavailable. Please try Where's My Refund again later." When I try again, it asks me to "Get Refund Status" and requires me to "Please enter your Social Security Number, Tax Year, your Filing Status, and the Refund Amount as shown on your tax return." There's a note that "All fields marked with an asterisk (*) are required." Then it asks for "Social Security Number" with an explanation to "Enter the SSN or ITIN shown on your tax return. Example: 123-45-6789" I know I'm putting everything in right because I'm looking right at my return. I've double-checked my SSN, filing status, and refund amount multiple times. What's weird is when I check my spouse's refund info using the exact same tool, it works perfectly fine with no errors. Has anyone else encountered this "We are sorry Where's My Refund is currently unavailable" message? Is the system having issues or is there something wrong with my information specifically? Any suggestions on how to fix this or alternative ways to check my refund status?