Thanks for the update ,we could see another type of issue like below “There are no updates available for installation’, then we manually download and install the security update .
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::Begin copying files to Windows Update cache
1> 2025-04 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5055526)
1> windows10.0-kb5055526-x64_319c68a1297c1166a2150f3e560f24061228b096.cab :: Copy To Cache: Failed. HRESULT: -2147024894
::End copying files to Windows Update cache
::Begin adding downloaded items to installer collection
skipped> 2025-04 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5055526) – Reason: Update not downloaded/cached
::End adding downloaded items to installer collection
There are no updates available for installation
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