Hue Integration Fails - "This entity is not available"

This is the wrong (sub)forum for the Hue integration and the Philips Hue Bridge, post instead under the configuration (sub)forum → Configuration - Home Assistant Community

This “Zigbee” section is about Home Assistant’s native ZHA (built-in Zigbee gateway) integration → Zigbee Home Automation - Home Assistant (and using devices with it)

So more on-topic is to read/follow this guide → Migrating from a Philips Hue Bridge to the ZHA (Zigbee Home Automation) integration

As well as these additional Zigbee guides (from the The Home Assistant Cookbook community guide):