Fully kiosk wont load

i recently reflashed an old galaxy tab to android 7.1.1 in hopes to use it as a dashbored for home Assistant. i got fully kiosk browser installed with no issues but getting it to work is a different story. I put in the start URL and it loaded to the sign in page for my home assisatnt asking for username and password, i put them in and after that it just stays on a blank screen. Anyone have any ideas as to why?

additonally i thought, “whatever ill jsut use the companion app” however same issue, i insert credentials and it jsut wont load the dashbored.

not sure if anyone has expereicned this before but any ideas would be appreciated. Thanks