Try this:
ISSUE: Metamask Extension Issue (+ w/ Google Docs )
Workaround: Setting the default wallet to None on brave://settings/wallet
Sources:
Can not connect meshswap.fi - #6 by fanboynz
Google Docs not workling on Brave - #32 by fanboynz
Google Docs not workling on Brave - #25 by Dkpower
Brave GitHub Issue Report(s):
Error when entering site requiring Brave Wallet #24413
Remove window.ethereum.* (non function properties) protection #14483