can't open illustrator ai file 2021 and asked to be converted
i was working on illustrator 2021 and saved the file as .ai, i'm opening it again a few days later and this pops up

i don't know which ones to check, so click them all. but then the file opens as this blank white file

i didn't have artboard, i only worked on 1 layer since i didn't do much. tried to change the view, following several tutorials and it doesn't work. what to do? why did it ask to be converted? i only work on illustrator 2021 all this time
