CRM 2015 reports errors

Hello,

In our CRM 2015 on premises, when I go to sales/reports, and I run any report, it runs without problems.

But if I create a custom report (any one), I have the error "rsProcessingAborted".

The SSRS log says:

"Execution failed for data set 'DSMain'"
"The target principal name is incorrect"

Any ideas about what can be the problem?

Thank you in advance