Factorio: 0.18.4
Packing Tape: 18.1.1
Belt Layer: 0.5.0

On load I get the following error

"Failed to load mods: Error while loading item prototype "packing-tape-beltlayer-buffer" (item-with-inventory): Key "icon" not found in property tree at ROOT.item-with-inventory.packing-tape-beltlayer-buffer.icons[0]
Modifications: Packing Tajpe

Mods to be disabled:
* packing-tape

I gather this is related to also having the mod "pipe-layer" installed although I haven't yet tried disabling it. May update this as have time, but no promises.

Thanks for the report, hopefully this is the last time I have to fix icon issues...

So far so good. This will save soooo much trouble when I have to move warehouses around. =)