#RC#
A generic revert signal usually hides a more specific logic conflict within the contract code. The metamask-extension interface might occasionally display a « nonce error » . Increasing your slippage tolerance to a more flexible range can bypass the execution revert. It is highly recommended to use a dedicated incognito window to avoid extension conflicts.
Most metamask-extension users find that a simple page reload fixes the « missing button » bug . Always keep your software up to date to benefit from the latest security and logic patches. Restarting your wallet or mobile app can often clear up mysterious « rejected » messages. Make sure you are not trying to execute a call while the wallet is locked.
A mismatch between the expected gas and the actual required gas can lead to a revert.