RBR10 https certificate error ERR_SSL_KEY_USAGE_INCOMPATIBLE

Hi

First up I apologise if this is in the wrong group, but this seemed the best option for my Orbi RBR10. Which is probably getting a little old but has been and still is great.

My problem is that accessing the admin page via https gives the error ERR_SSL_KEY_USAGE_INCOMPATIBLE on Chrome.

Searching the forum I can that this is a known issue and was resolved in March 2024 for other Orbi products. Unfortunately my little RBR10 seems to have been forgotten (or maybe the bug was reintroduced?), as the latest firmware 2.7.5.6 which for the release page appears to have been released on the 7 of Feb this year, 2025 (though that may be just when the page was updated).

So please Netgear folks could you please patch the firmware for my router so I can enjoy secure access to the admin interface?

Thanks for your help.