[BUG] Backup tests failed in test pipeline

[KryukovaPolina]

Describe the bug
https://github.com/Netcracker/qubership-opensearch/actions/runs/26153266099/job/76926023009

Error in backup tests

Granular Backup And Restore On S3 Storage                             | FAIL |
Keyword 'Check Backup Status' failed after retrying for 5 minutes. The last error was: Resolving variable '${content['failed']}' failed: KeyError: 'failed'

Installation_Clean_CURRENT_Monitoring_20260520105539420.zip

To Reproduce
Run nightly Opensearch pipeline (Clean [] with Monitoring and Allure)

template: https://github.com/Netcracker/qubership-test-pipelines/blob/feat/nightly_opensearch/templates/opensearch-service/opensearch_clean_all_on_sc_monitoring_allure.yml

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Environment:

• Application Version:
• K8S Version:

Additional context
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[PavelYadrov]

Currently problem is in the S3 parameters.

Backups are not getting created, all with one error

TransportError(500, 'null_pointer_exception', 'Access key ID cannot be blank.')

Something wrong with S3 creds in the secrets

[KryukovaPolina]

fixed in test-pipeline repository https://github.com/Netcracker/qubership-opensearch/actions/runs/26153266099