Not able to claim rewards since 2 months

After clicking on “CLAIM” nothing happens.
Not even an error message.

Are u Using the PC at scale other than 100%

If yes then close all applications
go to display settings (of ur PC)
set the scale to 100%
apply

now open brave try CLAIMING again
if it doesnt work then I am not Aware of any other solution

it is a known issue and there is a fix coming:

Workaround: Go to brave://settings > Brave Rewards icon, and make sure it’s visible (BAT icon in the URL bar).