Hello,
while doing some tests i triggered the following error:

Exception at tick 29436392: The mod Logistic belt 2 (2.0.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event logistic_belt2::on_tick (ID 0)
logistic_belt2/scripts/structurelib.lua:380: attempt to index local 'provided_item' (a nil value)
stack traceback:
logistic_belt2/scripts/structurelib.lua:380: in function 'find_producer'
logistic_belt2/scripts/structurelib.lua:1088: in function 'process_node'
logistic_belt2/scripts/structurelib.lua:1277: in function <logistic_belt2/scripts/structurelib.lua:1259>

Thanks for report. Should be fixed in release 2.0.6

Thank you very much for the quick fix.