Still a bug from early 2024 and possibly earlier @gopher.ny
See this post for solution:
Unable to set a static IP - Incorrect warning about subnets - #11 by jtp10181
You would need to do this:
/hub/advanced/switchToStaticIp?address=192.94.167.30&netmask=255.255.254.0&gateway=192.94.167.4&nameserver=8.8.8.8
