Trying to activate HBO MAX Streaming subscriptions but giving me a error message

I have been trying to activate my HBO Max subscription for more than two weeks, but I always get the following error when I click to the button "active":

“Something unexpected happened.”
“Please close this pop up and try again. If the problem persists, try again later.”

I was able to activate all of my other streaming services without any issues, but HBO Max consistently gives me this error. I need help resolving this problem.