Tried today to get my paperless with Tika/Gotenberg running, too...
Everytime the same - paperless try to open http://localhost:9998 instead of http://192.186.0.223:9998 or http://Apache-Tika-Server:9998 (Docker container name)
I am running out of ideas, my config looks ok - I set PAPERLESS_TIKA_ENDPOINT and PAPERLESS_TIKA_ENABLED...
Suggestions?
Thanks you.