Oops indeed! The Rainbow Poro was so eager to start partying— they popped up in the store faster than we could do some necessary setup! Your new poro buddy and accompanying emote should now be purchasable so please try again (you may need to restart the app)!
This thread was added on May 27, 2020, with posts from Broxxar, RiotReleaseMan.
Original Post
https://i.redd.it/aubwfyyzac151.jpg
Hi folks,
This was due to a timing issue with when the new data for the patch went out and when the offers to support that data were pushed. This timing snafu should be resolved in the next patch.
In the meantime, if you restart your client you should now be able to claim the offer. Please give a holler if that's not the case!