[Structure Importer] Button "import structures" in older versions does not appear

[HerolioMC]

I usually use Structure importer in BlockBench 4.9.4 because in the newer versions there's an error about the #side. But when i wanted to import my structure, i didn't saw the button to import structures

A few months ago, i was able to import structures in 4.9.4 because the button was visible. Now he's invisible and even in the features tab of the plugin i don't see "import structure".

In newer versions (starting to 4.11), the button appears, but have the "error:#side" issue so it doesn't import my structure