unsetting cache-tags helped fix "upstream sent too big header while reading response header from upstream" error. It seems that for D8 the naming convention has changed.
unsetting cache-tags helped fix "upstream sent too big header while reading response header from upstream" error. It seems that for D8 the naming convention has changed.

wunderkraut/WunderMachina,wunderkraut/WunderMachina,wunderkraut/WunderMachina,wunderkraut/WunderMachina