[SOLVED] Horror Dashboard

[agent_kith]

will try
but both Browsers have the same Dashboard

Yeah. That's a mystery. Likely the WebApp is corrupted somehow.

There are other ways the WebApp can be broken, e.g. when you disable javascript in the browser, and both of your Android and Desktop have this setting synced. There's always possibilities, but can't know for certain without more details.

and it is not exactly easy to navigate and apply the update.....

That's what the sideload is for. No need to navigate through the broken WebApp. Rename the downloaded firmware file and copy it over, reboot the computer and hope for the best.