Please change in
pypostprocessing_0.2.8/prototypes/functions/compatibility.lua
around
line 281
the
elseif recipe.subgroup == 'yir_tankwagons2a' and recipe.subgroup == 'yir_fluidwagons_4A' then
from and "and" to an "or" condition as likely intended.

Many thanks. =)

Ugh, due to two outliers, doing so first breaks the integration entirely though, as two cargo wagons are added to the fluid named groups... adding those to the previous cargo wagons list explicitly could help:
elseif recipe.subgroup == 'yir_cargowagons' or recipe.subgroup == 'yir_cargowagons_4A' or
recipe.subgroup == 'yir_cargowagons_2A2' or recipe.name == 'yir_cw_cargo_green_recipe' or recipe.name == 'yir_cw_cargo_blue_recipe' then
Thanks... =D