Same problem with me. I found a Reddit post that said to switch the region and Siri Language to South Africa and it worked! But when switching back to US region (or Portuguese region in my case), the problem persists. It seems there might be a problem with Apple's servers in some regions.
JoaoCGS
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution