Running Vaadin behind a reverse proxy (nginx) fails with You are offline prompt. (Solved)

I’m trying to put my Vaadin Application behind an nginx (two actually) and it fails with the below notification (Image 1)
My Nginx Configuration is according to Image 2. Where is my mistake?
image.png
image.png

NVM, main issue was that the service actually died without me noticing…

though now it’s somehow even worse, the page stays white altogether :rofl:

Disregard that, to figure out the culprit I just have to look into a mirror…

Running Vaadin behind a reverse proxy (nginx) fails with You are offline prompt. (Solved)