I can explain it, but can't make you understand it.
An FTT transfer will not occur over the weekend. Your transfer is coming from your local Wise account.
Make a transfer from your Nationwide account on Saturday and post the PDF.
It will state funds will reach your account Monday because the banks don't process it over the weekend.
Wise however operate 24/7 and if you have enough funds in your Wise account will electronically transfer that over the weekend period.