Transaction Stuck Pending, Won't Speed-up, Cancel or Appear on Explorer


I have a transaction that has been pending for 2 days now. It shows as pending in MetaMask but fails to appear on the block explorer. When attempting to cancel, I get an error message (attached) and when I try to speed-up, nothing happens at all.

My wallet is: 0x0a31327133c1C58489b2F88e9F84728b01486839

Am I missing something obvious here? Is this one for MetaMask support? Thanks.