Sudoku cannot be solved online

Sudoku lässt sich online nicht lösen

2 months ago

The numbers 7, 8 and 9 cannot be activated when filling in. No matter which size view I choose, the error always occurs. I have also tried it with other browsers. After the introduction of the new version, this only occurred sporadically at first, but for a few weeks now it has been a permanent problem. Who can help?

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