AUSST fails to generate webfeed due to 404 on AcroRdrClassicx64Upd2400130365_MUI.msp. Anyone else hitting this? Adobe support hasn't been able to engage on it.

ISSUE: AUSST 6.3.0.1 silently fails to generate webfeed manifest 
(updaterfeed.xml) due to AcroAUSST sub-tool returning error 9 on a 
404 from Adobe's CDN.

ENVIRONMENT:
- AUSST version: 6.3.0.1 (also reproduced on 6.2.0.3)
- OS: Windows Server 2019
- Web server: IIS
- Storage: D:\inetpub\wwwroot\updates

ROOT CAUSE:
AcroAUSST attempts to download:
https://ardownload3.adobe.com/pub/adobe/acrobat/win/AcrobatClassic/2400130365/AcroRdrClassicx64Upd2400130365_MUI.msp

This URL returns HTTP 404 (verified via Invoke-WebRequest from the 
AUSST server). AcroAUSST returns error code 9. The parent 
AdobeUpdateServerSetupTool then reports exit code 0, masking the 
failure. Webfeed manifest generation does not occur.

IMPACT:
- AUSST server cannot serve updates to clients
- All clients receive error 113
- Affects all AUSST deployments syncing current Acrobat updates
- No documented workaround

REQUESTED ACTION:
1. Restore the missing file at the URL above, OR
2. Remove the broken reference from the AcroAUSST manifest, OR
3. Patch AcroAUSST to skip individual file failures rather than 
   aborting the entire manifest-generation step