Error 500

Hello, I am currently trying to upload a singleplayer world onto my realm. I get the error message (500), and I am unsure why. My world did have some datapacks, but I removed them beforehand as I was worried it would break the world or the realm. Now no matter what I try, it still gives me the same error message when attempting to upload. I've checked the client logs, and nothing out of the ordinary appears. I have also gone and tried /datapack list to show that I am not using any datapacks on the world, yet I still receive the error message. I'm hoping I can get this resolved soon, as I am really itching to play some realms on a world I've worked so long on. Thanks!