It is hard when they refuse food, especially if its something you've lovingly prepared. Try not to worry though, at 8 months she should really be having around 600ml of first stage formula a day, which she almost is, but it doesn't really matter if she doesn't eat food. We all seem to be conditioned to ram as much into them as we possibly can but they simply don't need that much.
How would you feel only giving her solids once tomorrow and the next day, say for breakfast when she's bright and fresh and not feeling tired after a long day?
You could try a purée and give her the spoon while you eat your breakfast, a banana split lengthways or give her some eggy bread or even share some blueberry pancakes.
Agree that she may be teething or just feeling a little off. You could check her mouth for teeth coming through and apply a teething gel, like Dentinox, before you offer solids. If that doesn't work try her with ibruprofen about half an hour before her main meal. Then if she seems jollier, you know something has been bothering her 
Try to look on the next couple of days as a rest from weaning for both of you. If she's hungry offer her milk and if she does eat anything else, its a bonus.
If you try to view weaning as an opportunity to get them used to cups, cutlery, sitting at the table and exploring taste and texture it might take a bit of the pressure off 