Writer- Tools-Mail merge Wizzard (->calc) S.O.S!

Hello!
First I make a table in calc.
Then I want to put it in writter, when I come to the step Insert address block (Nr.three on the left!) .
I used Use the current document, (had it in calc -table- on desktop), then LETTER, then I choose the sheet on the Select address list, have choosen the doc to have a block (secon option), and then I did Match the documnet fields, which I of course finished with OK.

And after that button NEXT can’t be activated.
Only the button BACK could.
Is that sth wrong on my pc, or did I forgot to click sth and what?
Many thanks!

The next button will not become active until ALL the fields in the address block are satisfied.

You might have to edit the address block to delete an unused field.

I am opening a new thread as the additional comment I made here was not answered.