Your index seems to be broken or incomplete.
Please reindex your Zammad, this might also fix the reporting issue.
zammad run rake searchindex:rebuild
You might also be affected by:
- Array values (e.g. several states) nuke reporting profiles · Issue #2809 · zammad/zammad · GitHub (this is fixed with 3.2)
- Elasticsearch throws error 500 when filtering for owner or custom dropdown-fields inside of report profiles · Issue #2517 · zammad/zammad · GitHub (not yet fixed, just possibly, doesn’t need to be a fitting issue
)