OLE DB or ODBC Error Messages

[pingi14]

Good afternoon

I am all of the sudden receiving the below message

Can it please be suggested how to rectify

Thanks

[v-jiascu-msft]

Hi @pingi14,

1. What's the data source?

2. What's the connection mode? Import or Direct Query?

3. Were there any changes applied in the data source?

4. Did you delete any steps in the middle of the queries?

Try to refresh the preview in the Query Editor. Check if there are any errors.

Please provide the pbix file if possible. 

Best Regards!

Dale