Unable to reach PB3 after attempting update

It would no longer show up on the wifi network or via discovery tool after a couple reboots. After another 4-5 reboots, after finding this thread, I got it to enter wifi mode, but it wouldn’t navigate to the update tab and was not showing any PB data (see below).

I went directly to /update and was able to select the update file and clicked update, and got a notice that it was successfully updated. Weirdly, it was still at V3.5, despite using a V3.51 file. I then updated again and it seemed to be losing space very quickly, and I got this error

I try to navigate to http://192.168.4.1/ and see if it’s functional but it autodirects back to the recovery tool page.