function addVoteEscrow(address _voteEscrow) external onlyOwner {
    if (address(ve) == address(0)) {
        ve = VE(pendingVoteEscrow); // @audit-info The wrong variable is used. It should be `_voteEscrow`
    } else {
        voteEscrowEnableDate = block.timestamp + 1 days;
        pendingVoteEscrow = _voteEscrow;
    }
}
function multiStakerClaim(uint256[] memory tokenids, uint256[] memory epochs) public {
    require(address(ve) != address(0), ' VE not added yet'); // @audit-info reverts if `ve` is not initialized

    ...
}
function addVoteEscrow(address _voteEscrow) external onlyOwner {
    if (address(ve) == address(0)) {
        ve = VE(_voteEscrow);
    } else {
        voteEscrowEnableDate = block.timestamp + 1 days;
        pendingVoteEscrow = _voteEscrow;
    }
}
