It looks like you have the same issue as a couple of previous posts. Your search filters are ldap filters, these can’t be used with the Powershell Connector.
Your user search filter should be something like
get-aduser ? -Properties *
instead of
(objectClass=user)
The same would go for your group search filters.
Luckily Suneet has shared this link with a previous post that seems to be the same issue – https://docs.openiam.com/docs-4.2.0.8/connectorconfig/microsoft/4-adpowershell – hopefully that will give you enough to get going!