Structure block suddenly stopped being added to inventory

[fostralian]

My inventory isn't full, I've left the world, tried different images, not sure what the issue is. I can still spawn in the maps with commands though

[Razor7100]

If you have essential mod disable it

[samuel-krupke]

I have the same issue and no mods installed whatsoever. I was able to import 1 image with no problem at all and place it in the world.
The second image i could import in imagemap4 but it took several minutes and restarts until the structureblock showed up in inventory.
After this i cannot get more structureblocks in my inventory. The maps do generate as .dat files in the data folder, but I don't get structure blocks.

MC 1.21.7

[Shellygt2006]

I am having the same problem with this, the structure block does not appear when I imported an image, but I think this could be on
my side because when I update minecraft, my Minecraftworld folder got removed, so I have to copy the roaming files and pace it all into the package files, but now it stopped working and no importing to my world.