firstly check that theres only one object, sometimes i've added objects without noticing in blender. if no make sure you didn't just rotate it which might make prusa slicer measure it wrong

atleast they admitted it, still don't trust mcafee though...

diff country, im in SE Asia

cheapest bottom of the barrel pla, works well enough, and if it doesn't atleast it only costs 11 ish $ per kilo