Hi and welcome to the community. Unfortunately, Brave-Gemini Rewards wallet connections are currently limited. Linked the Brave support staff notice below. At this time, Brave-Gemini connections with users located in Argentina are not supported. You may want to track the topic as updates will probably be posted there.
What changed? It used to work ok until today for me. I’ve been able to link my brave reward account to my gemini account for a long time (about 8 months) and now this happend. Also, worryingly, my balance has been erased.