KSC 10.3.407 (upgraded from 9.2.69) not downloading updates for KES 11

[PatrickE]

On 5 different client sites, I upgraded KSC to 10.3.407, from an older KSC version, mostly 9.2.69.
They serve a mixed network of Win7, 8.1 and 10 clients with KES version 10.3.0.6294 and KES 11.2.0.2254.

After KSC installation, I created a KES 11 installation package from the KES 11 .exe file.
I migrated the update tasks and policies from KES 10 to KES 11.

“Download updates to repository” task still exists from older KSC version.

I have the following problem on all the sites : update database on KES 11 workstations fails (database out of date on client pc’s).
Note: update to KES 10 still works (databases are up to date on client pc’s)

In the Update task result, clicking on pc, lists this error:

Status: “Error verifying application databases and modules” Description: “update files are corrupted”.

Clicking on one of those error message, in the “Event settings” window, is mentioned: 

Description:

Event type:     Error verifying application databases and modules
Result:     Update files are corrupted
Object:     updates/bin/kes11/kes11-1313g.xml
Object\Path:     updates/bin/kes11/
Object\Name:     kes11-1313g.xml
User:     B-ARCHITECTEN\xxx  (Active user)
Release date:     6/01/2020 15:31:00

When checking in Explorer on the KSC server, the folder C:\Program Files (x86)\Kaspersky Lab\Kaspersky Security Center\Share\Updates\updates\bin\KES11 does not exist.

However, several folders for KES10 do exist.

It seems to me that KSC is not downloading application and database updates for KES 11, even though  there is a working KES 11 installation package, KES 11 has been installed on several workstations, and there is a KES 11 policy defined.

I have deleted and recreated the “Download updates to the repository” task, with default settings, but the problem remains.

Can you please help me fix this ? 

Thank you.

[PatrickE]

Note to moderators: I reposted this in the correct Corporate forum, this can be deleted