Custom DDL file location folder for RDL

Make sure the DDL file is place in this folder and has the following property set…

D:\Program Files\Microsoft SQL Server Reporting Services\SSRS\ReportServer\bin

File -> Properties -> General -> Unblock checked

Checked the “Unblock” in file permission, restart SSRS services, and try uploading the RDL file again.

Sources:

https://forums.ivanti.com/s/article/Error-when-attempting-to-preview-a-report-in-BIDS-Failed-to-grant-permission-to-execute-Exception-from-HRESULT-0x80131418?language=en_US

https://learn.microsoft.com/en-us/sql/reporting-services/custom-assemblies/deploying-a-custom-assembly?view=sql-server-ver16