the inventory crafting table aren't working

hi I can't and other players on my server can't use the inventory craftingtabel things just disappears 

What I expected to happen was...:
things just should not disappear

What actually happened was...:
the things disappears

Steps to Reproduce:
1. I put 1 log put in the inventory
2. it disaperd
3. I cudent make planks or craftingtabel