Can't import structure [MC fabric 1.21]

Well, after exporting a structure. When it comes to importing it into my minecraft gameplay it says:

"Structure 'file/<the folder ive saved it into>minecraft_test.nbt' is not aviable". 

NOTE: i can only export a structure when i put the name "minecraft:<name>" into the text bar (putting "minecraft:" before naming), is that an issue?

