KB2677: Veeam Backup & Replication plug-in missing in ...
https://www.veeam.com/kb267703.07.2018 · After installing Veeam 9.5 Update 3a and simultaneous upgrade of vSphere from 6.5 to 6.7 Veeam vSphere Web Client Plugin might stop working for vSphere HTML5 Web Client. However it is still operational in vSphere Flash/Flex Web Client. The issue is only reproducible in case the plugin was present on the vCenter prior to upgrade.
How to reinstall vSphere Web Client plug-in for Veeam ...
https://www.veeam.com/kb184923.01.2014 · In Veeam Backup Enterprise Manager, go to the vCenter Servers section of the Configuration view. Select the vCenter server you need and click Check version. If a connection to vCenter server was a success, and the plug-in is installed in vSphere Web Client, the Remove link will become active. Click the link to uninstall the plug-in.
KB1849: How to reinstall vSphere Web Client plug-in for Veeam ...
www.veeam.com › kb1849Jan 23, 2014 · In Veeam Backup Enterprise Manager, go to the vCenter Servers section of the Configuration view. Select the vCenter server you need and click Check version. If a connection to vCenter server was a success, and the plug-in is installed in vSphere Web Client, the Remove link will become active. Click the link to uninstall the plug-in.