Image appears darker in Photoshop when imported from Lightroom

I usually edit my photos in Lightroom, and when I need to do something specific, I import them into Photoshop Beta from Lightroom. Have been working that way for years. But today, when I imported an image from Lightroom to Photoshop, the colours in Photoshop were completely off. The image appeared much darker and desaturated than it did in Lightroom. I have tried changing the colour profiles, but nothing is working. It worked perfectly fine yesterday, but all of a sudden today the colours are just completely off.