I’ve been subscribed for months now but never had this issue. I checked my payment history and I didn’t miss any payments.
Also, I tried downloading the dev version of Brave and activating the VPN - same issue. Although it allowed me to make a new free subscription which I cancelled after realizing I still couldn’t use it. The first time I tried it, it seemed the sub went through, but I got stuck on the “connecting” popup. Then each subsequent attempt to enable the VPN just took me to the subscription screen again.
I looked at my google play account and my brave subscription is still active. I tried pausing, cancelling, resubscribing, and it still didn’t work. Brave still thinks I’m not subscribed.