The thing with natural products like beetroot is that some might contain more or less water than another. For that reason, your dough might need a little bit more or less liquid to get the right consistency. If it is a little bit dry and doesn't form a squishy dough when you pinch it together, just add about a tbsp of water and blend again. If it's still too crumbly, add another splash and repeat until it's done. If it's too wet, do the opposite and add another tbsp of flour.