For wallet connection or staking issues, try:
Disconnect the wallet.
Exit out of Venice completely.
Restart the wallet app.
Reopen Venice and reconnect.
Try using Venice in another browser on your device and connecting there.
If you use the Base wallet, try logging in through the Base wallet app itself rather than the Venice app or another browser.
Also confirm you have a small amount of ETH on Base to cover gas fees. If it continues, noting your device, which wallet you use, and a screenshot of the error helps it get investigated.