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BugZero found this defect 1001 days ago.
When installing the CDP I/O Filter, the operation fails with "Storage providers are offline." When this occurs you may also notice that within the VMWare GUI the VMWare storage providers show as disconnected. The following is an example of what can be found in the I/O Deployment log:C:\Programdata\Backup\Utils\I_O_filter_deployment.log
Research indicates that this problem often relates to an issue with the VMWare Storage management service (SPS) certificate.
VMWare has a script (unreg_vasa) that recreates the SPS certificate and re-registers the service. That script and usage details are available on VMware KB84197: /storage/log filling up after vCenter upgrade to 7.0u2. The script is listed on that KB on the right side in the " Attachments " section.