My recent map is unplayable due to some limitation?

The following is my screenshot link

https://ibb.co/K2vS3cB

I put lots of effort to make this map, it’s a 256x256 map, I just added some terrains and doodads.

Please let me know how to remove the limitation please :frowning:

I don’t wanna remake my map spending another month!! :cry:

Can anyone help me? I don’t wanna make my effort worth nothing :frowning:

Thanks!