Invalid SSL Cert on BR1 MAX 5g

Chrome and Edge report the default cert as invalid. I’m using firmware 8.3.0. I’m getting tired of the extra clicks to get in to manage my Pepwave. I tried replacing the Web Admin SSL cert with a self-signed cert, but this doesn’t seem to work. I still have the browsers reporting it as not secured as it is an invalid cert. Is there a guide I’m missing to correct this?