Hi @Anonymous ,
When you open the Web Service URL and get a 500 error, you need to check if your configuration is successful. Usually you can view the error message in LogFiles, the default path is: C:\Program Files\Microsoft SQL Server Reporting Services\SSRS\LogFiles. This path can be different, depending on the instance directory selected during the initial installation.
Also make sure to provide the NETWORK SERVICE account with rwx permissions for the SSRS root folder (in my case, it was the C:\Program Files\Microsoft SQL Server Reporting Services; Properties -> Security -> Edit...).
Best Regards,
Joy
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