Why am I unable to run any Reports and are multiple “ConfigMgr__OLD.x” Folders created?

When I try to run Reports in the ConfigMgr Console nothing happens. If I look at the SSRS site in my browser there is nothing inside the ConfigMgr_ folder and I see lots of folders called ConfigMgr__OLD.0, ConfigMgr__OLD.1, ConfigMgr__OLD.2, etc. and I can’t run any Reports from the Reporting Site.
 
If I look in the srsrp.log I see the following repeated over and over again:
 
Successfully get report server from Registry
Moved folder from /ConfigMgr_ to /ConfigMgr_.OLD.0
Created folder [/ConfigMgr_]
Creating data source {5C638F2-4BB6-4a1b-A16E-8D96795D8602} at ConfigMgr_
Invalid class
Could not retrieve the reporting service name for instance ‘MSSQLSERVER’
Invalid class
Could not stop the reporting service “

“Microsoft.Reporting.WinForms.ReportServerExceptionThe SELECT permission was denied on the object ‘MDMDeviceProperty’, database ‘CM_’, schema ‘dbo'” when trying to run the “List of devices by Conditional Access State” Report

I am trying to run the List of devices by Conditional Access State Report but it’s failing with the following errors (truncated for readability):

Microsoft.Reporting.WinForms.ReportServerExceptionAn error has occurred during report processing. (rsProcessingAborted)
——————————-
Microsoft.Reporting.WinForms.ReportServerExceptionQuery execution failed for dataset ‘DataSet0’. (rsErrorExecutingCommand)
——————————-
Microsoft.Reporting.WinForms.ReportServerExceptionThe SELECT permission was denied on the object ‘MDMDeviceProperty’, database ‘CM_’, schema ‘dbo’.

“Microsoft.Reporting.WinForms.ReportServerExceptionThe SELECT permission was denied on the object ‘ApplicationIdToNameMap’, database ‘CM_’, schema ‘dbo'” when trying to run the “List of non-compliant Apps and Devices for a specific user” Report

I am trying to run the List of non-compliant Apps and Devices for a specific user Report but it’s failing with the following errors (truncated for readability):

Microsoft.Reporting.WinForms.ReportServerExceptionAn error has occurred during report processing. (rsProcessingAborted)
——————————-
Microsoft.Reporting.WinForms.ReportServerExceptionQuery execution failed for dataset ‘DataSet0’. (rsErrorExecutingCommand)
——————————-
Microsoft.Reporting.WinForms.ReportServerExceptionThe SELECT permission was denied on the object ‘ApplicationIdToNameMap’, database ‘CM_’, schema ‘dbo’.

Why doesn’t the “License 14A – Microsoft Volume Licensing reconciliation report” correctly calculate downgrade rights for Microsoft Access 2010 when additional Access 2013 licenses are present?

I’ve noticed that the License 14A – Microsoft Volume Licensing reconciliation report doesn’t correctly calculate downgrade rights for Microsoft Access 2010 when additional Access 2013 licenses are present.

Why does it take so long to open/ view the “Software 10B – Computers with a specific custom-labeled software title installed” Report?

I am trying open/ view the Software 10B – Computers with a specific custom-labeled software title installed Report but it’s taking 5–10 minutes.

“Logon failure: unknown user name of bad password” Error when trying to view a Report

When I try to view a Report I get the following error:

Logon failure: unknown user name of bad password

“The DefaultValue expression for the report parameter ‘UserTokenSIDs’ contains an error: The specified directory service attribute or value does not exist” when trying to run Reports