Hello forum members, FYI I'm a technical user (not a dev though), but a noob to OpenWRT. This is my first day with OpenWRT in general and especially on this device.
I got the Netgear R7800 yesterday and tried the stock firmware to get a feel for its capabilities and its range. Today I installed OpenWRT 19.07 factory on it via the stock GUI. Most things worked except the 5Ghz which started to work after a reboot.
While trying some settings in Network -> Interfaces, the page suddenly wasn't reachable anymore. After a reboot other parts of LuCI were not reachable anymore. At first System -> Administration, after a factory reset the the Overview page was not reachable anymore.
Now, after another factory reset I can't even set a root PW. The browser always says site not reachable.
So my question now is: Shall I flash again and if so, which image should I use? Or am I on a completely wrong path?
EDIT: These are the only errors I could find in the syslog https://8n1.org/16645/8667