Try select ‘This Can Read and Change Site Data’
Select ‘On All Sites’
Switch to a different network and back again. To do this, click on your current network at the top of the app. Select a different network, and then switch back to your original network again.
Try adding a token by opening coingecko page and clicking on the fox icon
Install MetaMask using another supported browser (Firefox, Chrome, Brave, Edge) from our official website https://metamask.io , and then try restoring your wallet using the 12-word Secret Recovery Phrase in case the issue is only present in the browser you are currently using.