VMware: Performance Overview Chart could not be loaded

After installing the new Performance Overview plugin for vCenter 2.5u4. There might be a change that the following “error” appears when you start the plugin.

But, VMware did a great job and  published this workaround:

Workaround: If VirtualCenter is upgraded when the VMware Infrastructure Web Access Service is running, you need to reinstall the Virtual Infrastructure Web Access feature and re-install the Performance Overview plug-in:

1. In the Add or Remove Programs utility, change the VMware VirtualCenter Server program.
2. Modify the VirtualCenter Server installation, and remove the Virtual Infrastructure Web Access feature.
   
3. In the Add or Remove Programs utility, change the VMware VirtualCenter Server program.
4. Modify the VirtualCenter Server installation, and install the Virtual Infrastructure Web Access feature on the local hard drive.
   
5. Re-install the Performance Overview plug-in:
   1. In the command window goto to the folder vpx/perfCharts, the location where the Performance Overview plug-in is available.
      If you are using the ZIP file, go to the bin\perfCharts folder.
   2. Run uninstall.bat <VirtualCenter_Username> <VirtualCenter_Password>
   3. Run install.bat <VirtualCenter_Username> <VirtualCenter_Password>
6. Connect the VI Client to the VirtualCenter Server, and enable the Performance Overview plug-in:

1. In the VirtualCenter Server, click Plugins > Manage Plugins.
2. In the Installed tab of the Plugin Manager window, for com.vmware.vim.stats.report select Enabled.

Source: KB1008330