This happens to me twice this week, first with the white and second with the black resin. It seems like the resin is soo goeey to begin with.
I clean the tank carefully and filter the old resin from big chunks and it seems to work again on the same parts, same setting, same file.
I wonder what happened there. There were a couple incidents like this found in the search but not sure If I understand how to prevent this from happening again.
Printer is about 60% use all the time and 1 year old.