I can't withdraw ETH to MetaMask

I deposited funds to DSA, #6718, contract https://etherscan.io/address/0x458E820A75f690f2DD46a8f3CA4D936b7327EA5d

I can’t withdraw funds back to my Metamask “owner” account.

When I click “Withdraw” and chose ETH, Max, I get a MM confirm that looks like that:

I then see a “Txn Pending” popup in my Dashboard window. The transaction is never found on Etherscan.

I tried increasing gas, withdrawing all my fund, only half of it. Nothing works.

Here is the last withdrawal I created: One for “max ETH”:

Any help?
What am I doing wrong?
Can I suppress the contract and recover my funds?