Where's the vSAN problem here? I ask as you posted this to vSAN sub-community and every Google search result for the error message you mentioned points to NetApp issues.
Please suggest me to which community shall move this and yes agreed every search is points NetApp issues, in few cases its showing cert issues may cause from vCenter versions later 6.x
No worries at all - just if you post in the incorrect place then you are less likely to get an answer.
vSphere General probably best for most activity:
If you think it may be a cert issue then check the logs mentioned in this kb and/or apply the steps provided: