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I had problems printing the grid.
But figured out a way to print it.

https://uploads.guim.co.uk/2018/03/23/2,389_March25.pdf

Well done Sunray, your ability has overcome the Guardian's inconsistency

Instead of trying to print the crossword when you first access the link, after accessing the link, scroll down the bar with today's and recent crosswords. Click that link for today and it will print (well, mine did, anyway).
It makes me sigh.