I am getting an error message in regards to my HBP repayment and cannot submit to Netfile.

I'm getting the following error message: You have unused RRSP contributions from prior years and you have designated RRSP contributions as your HBP and/or LLP repayment. Any portion of RRSP contributions made in 2017 or before cannot be designated as HBP/LLP repayments.

I don't have unused RRSP contributions from prior years. Everything looks fine with my RRSP details and my HBP repayment. RRSP contribution is higher than my HBP repayment. I tried "skipping" the error, but it won't let me Netfile until it is fixed. It looks like this was a problem last year but was fixed. One post suggested clearing the browser cache, which I have done, and it still doesn't resolve this problem.