If you faced this error when you tried to run any of the standard reports in D365FO, it's better to re-install the reporting extension in one box environment
Go to C:\AOSService\PackagesLocalDirectory\Plugins\AxReportVmRoleStartupTask
then open windows power shell as administrator and run the following command
.\DeploySsrsExtension.ps1
After that, you also needs to re-deploy all reports with the command .\DeployAllReportsToSsrs.ps1
