Splunk integration - Mirroring not working

[PhilippGutjahr]

I have a problem with the incoming mirroring, the comments have not been synced back to XSOAR when using Splunk ES8.

As a result I upgraded the splunk content pack to 3.3, but now the entire mirroring is broken. No updates are synced back to XSOAR (Version 6.14.0 Build 3036535).

I noticed the developer tools are listed as mandatory but they are not included in the splunk pack, so I uploaded them manually. Unfortunately this did not resolve the issue.

This is what I see in the integration logs:

2025-09-26 11:45:15.8049 debug (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) mirror-in: performing `incident_review` search with query: |`incident_review` | eval last_modified_timestamp=_time | where last_modified_timestamp>1758876792.000754 | fields - _time,time | expandtoken. (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:985) 
2025-09-26 11:45:18.0817 debug (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) Setting integration context (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:985) 
2025-09-26 11:45:18.0821 debug (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) Updating integration context with version -1. Sync: True (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:985) 
2025-09-26 11:45:19.4997 debug (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) Found Splunk ES version: 8.2.0 (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:985) 
2025-09-26 11:45:20.3990 debug (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) get_comments_data_new: mc_notes query completed in 0.897 sec for 2 notables and 2 notes (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:985) 
2025-09-26 11:45:20.4016 info (SplunkPy_demosa_splunkcloud_instance_1_SplunkPy_get-modified-remote-data) Full Integration Log:
An error occurred during the Mirror In - in get_modified_remote_data_command: argument of type 'NoneType' is not iterable

Traceback (most recent call last):
  File "<SplunkPy>", line 4029, in main
  File "<SplunkPy>", line 2046, in get_modified_remote_data_command
  File "<SplunkPy>", line 1852, in get_comments_data_new
  File "<SplunkPy>", line 1733, in format_splunk_note_for_xsoar
  File "/usr/local/lib/python3.12/urllib/parse.py", line 704, in unquote
    if '%' not in string:
       ^^^^^^^^^^^^^^^^^
TypeError: argument of type 'NoneType' is not iterable
 (source: /builds/GOPATH/src/gitlab.xdr.pan.local/xdr/xsoar/server/services/automation/dockercoderunner.go:981) 

Any assistance is appreciated.