Problem adding hub to Hue app using HA addon

Hi, I’m trying to setup the HA addon of diyHue and I’m running into a problem. With the Hue app on ios, I try to add the emulated bridge and the app detects it, but as soon as I press link it then says ‘no hub detected’. I’ve checked the MAC address and tried deleting the certificate. I’ve also tried updating the software version in the dashboard and uninstalling/ reinstalling the addon.
Hue essentials seems to work fine but I need to get the hub registered on the Hue app.
Any ideas anyone?