Problems with EMC VSI for Vmware Web Client

Hello.

I installed the 7.4 version of the EMC VSI for VMware Web Client.

It does not function correctly.

Actually, there is a delay in showing datastores information through the use of the plugin.

The "ALL EMC VSI plugin Actions" menu doesn't show any sub-menus. I cannot provision any new datatores using this plugin.

I also receive some error messages suchs as :

"some elements could not be shown or their information could not be retrieved in time" or

"com.emc;vsi.providers.compression.BlockCompressionEnabledProviderImpl which took more than 120 seconds"

The Vcenter version is 6.5.0 build-7312210.

The Vsphere servers versions are 6.0 to 6.5.

The VPLEX clusters version is 5.5.

Thank you for your help.

Best regards.

Khatib.