Structure block

Structure block will save and load a structure within the same world perfectly fine, but when loading the same structure into another world, the load button does not light up. The white guide lines appear after typing in the name, and it’s the correct size, but the actual button to load never lights up. I’ve even tried loading a structure smaller than 32x32x32 as apparently there is a size limit, but that has not worked either. This is on MCPE.