Avamar: Error deploying Avamar vCenter plugin for vSphere version 8 and above
Summary: Deploying the Avamar vCenter plugin for vSphere version 8 and above results in an error.
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Symptoms
Errors similar to the following are seen in the installation log:
[2026-04-29T13:10:21.316+02:00] [ERROR] plugin-deploy20com.vmware.vise.extensionfw.impl.PackagesDeployer Error deploying one of more bundles for the plugin package /etc/vmware/vsphere-ui/vc-packages/vsphere-client-serenity/com.dell.emc.avamar-19.12.339099.0 org.osgi.service.subsystem.SubsystemException: Framework could not resolve the bundles: [com.dell.emc.avamar.aui_1.0.0 [386], org.eclipse.virgo.web.dm_1.0.0 [385], org.osgi.service.subsystem.region.context.8_1.0.0 [384]]
Cause
The Avamar vCenter plugin is unsupported for v8 and above. Compatibility Guide for Avamar Virtualization 19.12, footnote 50598:
The HTML5 vCenter plugin is supported only from vSphere 6.5 to vSphere 7.0U3. For vSphere 6.0 or below and vSphere 8.0 or above versions, please use the vCenter authentication mechanism by the HTML5 Avamar UI.
Avamar 19.12 Virtualization Simple Support Matrix
It should be noted that in general the vSphere UI plugins are also deprecated in v8: https://blogs.vmware.com/code/2022/11/07/whats-new-for-vsphere-ui-and-plugins-in-8-0/ (External Link)
Resolution
Use the regular Avamar UI for backup and restore operations.
Additional Information
Affected Products
Avamar Client for VMwareArticle Properties
Article Number: 000458896
Article Type: Solution
Last Modified: 13 May 2026
Version: 2
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