I usually don't play Minecraft, but I got bored and built a beach house.

*This is in survival mode, but it has cheats enabled*

This world does have mods, though if you don't have them, you shouldn't have any problems other then some errors.

If you do have trouble loading the world, here's my mod list:
Dynamic Lights Mod 1.12.1
Optifine 1.12.2 (Wouldn't be the cause of any errors)
Pixelmon 1.12.2 (May cause Minecraft to crash when installed)
Xaeros Minimap 1.14.4 1.12.2