I went to split a stack in my inventory in single player of black hull and the game said: "Object is unknown on server... re-requesting..." and this happens with all of the multi stack items.
Steps to reproduce:
Install starmade v0.194
Enter game
Acquire any two or more items that combine into a MultiSlot group
Attempt to split the stack by right-clicking
An error will appear, "Object is unknown on server... re-requesting..." instead of the split dialog.