Equations that I know worked fine just a few weeks ago seem to result in just an error showing up. For example, even a simple equation of x*y=-4, which simplifies to x=-4/y, now simply just comes up with "Error:" and I don't know why. I saw another question (https://web2.0calc.com/questions/why-this-proportion-that-until-two-days-ago-gave) having a similar error problem... please fix it?
