Any reason we cant play together in ranked?

https://preview.redd.it/42zvtsc8exih1.png?width=285&format=png&auto=webp&s=19bd877196d410b6c5aceb24d789787ecb32e7cc

My friend is Daimond 4 95Lp and im Diamond 4 65lp but for some reason we are getting this error (in our previous game we both had that Is climbing icon on our loading screens so might be something to do with that :/ )