@savannahssucculentgarden, it has some of the same soil from the nursery but I did repot it with newer soil as well. And I usually do not water it often but I did recently and it doesn't get much light but it did get changed from natural light to an indoor light but I might move it back to natural light to see if that also helps but it was just on a shelf in the bedroom but I moved it to a bookshelf in my guest room with my other plants and now it is doing this :(
Are the leaves mushy? I'd quarantine it for starters. It's possible it's a fungus. Remove these leaves dipping your shears in alchohol or bleach after each cut then treat the plant with neem oil if you've got some. If it's not a fungus, then as @kaporyash said, less water and more indirect sunshine. They do fine in low lit rooms but they do fine in the light too. Good luck
Regardless of the cause, you should remove the affected leaves. They won't come back. I recommend watering once a month. They can survive in artificial light, as long as they get enough of it. If you don't keep the light on in the room every day, maybe try moving it to a window again. This could be from a combination of low light and water. The less light it gets, the less water it needs.