There is a common error message received often after upgrading Telerik Reporting:
Unable to get report parameters. An error has occurred. Cannot read a document with the specified schema: http://schemas.telerik.com/reporting/2023/1.1. You might be using an older version of the product.
Obviously, I have a mismatch between the new report that I created and the deployed Reporting application. To create the report that is generating this error, I copied from an existing (and working) report. Only changed the Stored Proc being called and a few field names. Everything else is the same.
Except -- (OBVIOUSLY) -- when I saved the report -- the Designer changed the schema version.
You need a way in the DESIGNER to display the schema version of the report. If these reports are TRDP then I don't see an obvious way of viewing the schema version of the report. I opened both reports in the designer and tried to find a way to view the schema versions of a working versus non-working report. So that, I could determine which version of the designer that I need to drop back to (in order to create my copy of an existing report).
In your error message, you could easily provide additional detail but do not. You just say "product". Obviously, you know this but you don't report it to user. For example, you could say -- "This report has schema version xx.xxx.xx but the Reporting Engine can only run reports of schema version yy.yyy.yy and below" or something to that affect. Good error messages would go a long way to avoiding this frustration.