I have a problem with a transaction until yesterday it was stuck in the transaction pool with more than 20 hours and without being processed, today it has not yet been confirmed and now it no longer appears in the pool and I do not locate in explorer.arto.cash through the trasaction hash.
hash: 54373C850BBB65121A2FBC8A260D12BAF920F051E0B736A74CDF69404D68FE4B
To send huge amount decrease the mixin eg. to 0 or 1.
Try to reset the wallet under File menu.