@Jarro To be able to use AX55 in Easymesh when AX55 is in AP mode you should update to FW v1.3.1 - here. Now, what about C6 - which is its HW and FW version ?

@Ed-S Which model is your RE ? RE705X or different - that's on the device back sticker. Which FW version does it have ? As far as you described you have an issue only with the Apple devices, correct ?

@Critch0 Update your RE450 FW to its latest release - here. You should reset and reconfigure the RE after this update. Then go through this article for placing your RE for optimal reception and...

@OB1t How you're trying to access teh RE WebGUI. If teh RE has a static IP address 192.168.x.11 you should point your browser to http://192.168.x.11. In either case - only router DHCP active or both...

@HelenAggy Check this post. This should give you an idea how to do it.

@sohouser Yes, it's different but here it is: