RP-AC55 and AC3200 - AC55 no internet

Hi folks,

I’ve been googling all evening and switching router and repeater in and off and resetting and have now given up.
Anyone any tips on making an ASUS router (3200) repeat via an ASUS repeater (ac55)?
I have so far managed to get the repeater to create a repeated 5g and 2g network with different ssid’s
I have sometimes been able to actually connect using my iPhone or MacBook.
I then Can’t get to the internet though.

Apart from one instance where I had tried switching my phone...

RP-AC55 and AC3200 - AC55 no internet