Problem adding IKEA Trådfri repeater to Homey

Is it possible you don’t have anymore stable Zigbee network ?

Check out this for more :

And
https://support.homey.app/hc/en-us/articles/360019239879-Creating-a-stable-Zigbee-network-with-Homey-Pro

..at least something, as it’s not apparent, which HP are you using, how many devices you have etc.