I have already searched for as many threads I could find to find a solution and tried them all as best as I could, but I can't make glass shader or Principled shader work with to make a transparent material resembling a realistic glass or clear acrylic. It almost always shows as completely black, or sometimes mirror-like
The most common solution to this was to increase bounce values, which I have done. I have also tried flipping and recalculating faces and tried different lights. The only closest material I can make to a glass is by using a transparent shader with a glossy one, but its result isn't satisfactory. The environment is set to black background, and setting it to any other colour just introduces reflection of that colour on upper half of the sphere.