Weird. Maybe it's because I'm using Edge. I just hit another similar error on the "addition-subtraction" one. I can't get past it even by "Show Answer". I'll s

Weird. Maybe it's because I'm using Edge. I just hit another similar error on the "addition-subtraction" one. I can't get past it even by "Show Answer". I'll switch to Chrome and see if it persists. Edit: Tried it in Chrome and the error persists