Hi,
Since we upgraded to 6626.1 our TimeXtender SQL Data Source (18.0.1.0) type data source has been failing. We believe it is because 6626.1 expects a TimeXtender SQL Data Source (20.0.1.0). This either is a bug that needs to be fixed, or in the product update log / in the portal there should be some warning about this. If this was mentioned somewhere in a product update please share the link to the article.