I can't place/break blocks in a specific world

Hi there,

So my world has been around for 2 years, but hasn't been used for over a year now. Everything seems to be okay, except when it comes to placing or breaking blocks. I can interact with mobs, a creeper exploded and blocks were destroyed, I can interact sith redstone, and even eat, but I can't break or place anything. I had a friend join me and she also faced this issue. The world is around 150mbs in size. No resource packs active. Other worlds I have work just fine. The world has been made in survival and has not changed to creative or adventure ever.

It is a world that bears a lot of memories, and I would hate to see it go. If you have any suggestions as to why this may be happening, I would love to hear them. I couldn't find anything that matched my problem, unfortunately.

Thanks!