Can't connect to DVl-A50 driver page

Hi, all
I was just wondering if anyone could help or has had a similar problem connecting to the DVL-A50 driver page.
I’ve followed everything on this page DVL Integration · GitBook
up to the part where you need to go to where it just goes blank and comes up with a error message.

I’m currently using the new blue rov OS and a beta version of ardusub. I’ve got the DVL connected and is working on the other one but unable to still get on the other webpage.

If anyone could help that would be great thanks.