Device: iPhone XS

OS: iOS 12.3.1

I get the following error when I try to equip any items from the Shield and Relentless sets on any of my champions: "The game is currently experiencing some issues. If you continue to see this error please contact the Support Team." 

I am able to equip any other items from any other sets without problems. I think someone else had a similar problem but with selling items from the same sets mentioned.

They're one of the best sets in the game and not being able to use them is really frustrating, please fix :)