Issue Could not load assembly 'System.IO.Compression.dll'

[flyd]

Server operating system version

Microsoft Windows Server 2016

Plesk version and microupdate number

Plesk Obsidian, Version 18.0.51

Hi, with the last update: (Plesk Obsidian, Version 18.0.51, dernière mise à jour le 26 Mar 2023 22:01) my backups have an error per site like this:

<execution-result log-location="*\2023-03-31-010030.370\migration.result" local-dump-created="true" export-dump-created="true" local-dump-name="backup_info_2303290103_2303310100.xml" export-dump-name="backup_2303290103_2303310100.zip" status="warnings">
<object type="Server" name="*">
<object type="Customer" name="*.com">
<object type="Subscription" name="*.ca">
<object type="Mail" name="*.ca">
<message severity="warning">
<description>Could not load assembly 'System.IO.Compression.dll'</description>
</message>
<message severity="warning">
<description>Could not load file or assembly 'System.IO.Compression, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.</description>
</message>
<message severity="warning">
<description>Unable to back up mail messages. Error: Failed to back up mail messages</description>
</message>
</object>
</object>
</object>

After a couple of research, I think it's one of the updates of .net core. In the changes log, I see:

• Updated ASP.NET Core 7.0 to version 7.0.3.
• Updated ASP.NET Core 6.0 to version 6.0.14.

So, what I can do now?

Can I just try a new install of the ASP.NET Core?
Is a update of config file required somewhere in the Plesk backup engine?

Thanks for help!

 

[scsa20]

Did you updated your .NET Framework? If not, try updating that.

 

[Peter Debik]

@flyd: Please install or update .NET Framework 4.8 on the server.

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