SC: Remastered unable to add friend

Hello. I keep getting the following error when trying to add a specific person (let’s call them Player1) to my friend list:

Player1 is playing StarCraft in a different Blizzard region than you. Your friend request to Player1 has been sent in the region you are playing in (US), and they will receive the friend request when they switch to US. (Failed to make initial server connection (Error 2:7))

However, this person is on USWest hosting games while I’m on USWest as well. I’ve attempted to go to different regions including USEast, Asia, Korea, and Europe to add them but I get the same error.

Any idea why this is happening?