When open the Accessories screen with the left hand is empty, the image is missing. See the images to better understanding.

Game version: NeoForge 21.4.49-beta
Accessories version: 1.2.15-beta+1.21.4
No additional mods.

Thanks,

Hmmm such might be present within 1.21.1 as well but such should be a simple fix within the coming days

Sorry for the delay on this one but a release has been made to fix this issue on modrinth and curseforge