I assume you are not from The US. If you were, you shoulda be able to connect.
Also, sharing what error you get would help.
Gemini is now only supported in The US. When you formatted the computer, the brave data was lost and hence, a new rewards profile was created when you installed Brave. New profiles which are not from The US, cannot connect simply.
Hi. India is unsupported region therefore you cannot earn.
The changes made to rewards in February made it so that only rewards wallets connected to Uphold /Gemini will earn BATs.
Don’t worry, India is going to be back soon. Somewhere around September to October. Was told by Brave Rewards Project Manager.