Goto the menu: "Tools -> Preferences -> Fees"

Check the "fee estimation" type... is it set to ETA? or Mempool?

You might also want to check the "edit fees manually" box:



That'll let you set the exact fee you want to pay... NOTE: doing this may mean your transaction gets "stuck" if you set it too low... the mempool is VERY full right now and fees are insanely high!