BO Explorer Indexing Issue

Dear Experts,

After the BO migration to 4.2 SP3, we are getting below error while indexing the BO Explorer reports.

Any solution for below error please.

Error:

Server, risebotpros.ExplorerIndexingServer, generated the following messages: {{PS_50308_DATA_SOURCE_PROVIDER_EXCEPTION}} (The creation of the data source object tree failed.)

Thanks in advance.

Best Regards,

Krishna