u/Big-Oil5683

I am currently waiting for my STEM OPT approval, and I switched from 1099 to W2 with my employer because STEM OPT only allows W2 work. My employer started a case in E-Verify today to register me as a new employee because I was a contractor before. But when I’m trying to fill out my part of I-9 there, it gives me the message that the case number is not valid. I already submitted it multiple times but it doesn’t work. Has anyone experienced the same issue, and were you able to solve it?