Elasticsearch functional but search returns StatusCode 500

Infos:

  • Used Zammad version:
    Version 5.0.x
  • Used Zammad installation type:
    Docker Compose
  • Operating system:
    Ubuntu 20.04.3 LTS
  • Browser + version:
    Mozilla Firefox 98.0

Expected behavior:

  • The search should work and provide search results

Actual behavior:

  • Since the last update to the current version the search does not work anymore. I tested everything yesterday via Putty and also sent a search query towards ElasticSearch via Putty (curl -xget) - with success; I got a JSON back.
    However, when I use the search in the Zammad web frontend, I get a StatusCode: 500 - Internal Server Error.
    Is this error already known if applicable? Unfortunately I didn’t really find anything on the web / forum. As I said, the Docker containers are all running without errors, as well as the ElasticSearch (reindex I had already rebuilt several times - without improvement).

Steps to reproduce the behavior:

  • Insert search term → StatusCode 500: Internal server error

Nobody with the same issue?