The report cannot be displayed. (rsProcessingAborted)

I am using Dynamics CRM 2011 on premise.

Reports were working fine a few days ago. Today they don't.

I am getting this error: "The report cannot be displayed. (rsProcessingAborted)"

I just run a report with warning level tracing on and this was logged:

[2013-07-09 14:10:50.099] Process:CrmAsyncService |Organization:00000000-0000-0000-0000-000000000000 |Thread:  102 |Category: Sandbox.LoadBalancer |User: 00000000-0000-0000-0000-000000000000 |Level: Warning |ReqId: 0792ea86-fee7-4f86-b38a-00b5cf68cf57 | SandboxHostManager.PingSingleClient  ilOffset = 0xB8
>ping: exception: SRV-CRM02: System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at net.tcp://srv-crm02/CrmSandboxHost that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
[2013-07-09 14:10:50.512] Process:CrmAsyncService |Organization:00000000-0000-0000-0000-000000000000 |Thread:  102 |Category: Sandbox |User: 00000000-0000-0000-0000-000000000000 |Level: Warning |ReqId: 0792ea86-fee7-4f86-b38a-00b5cf68cf57 | SandboxClientBase`1.Stop  ilOffset = 0xD
>System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.

Server stack trace: 
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at System.ServiceModel.ICommunicationObject.Close()
   at Microsoft.Crm.Sandbox.SandboxClientBase`1.Stop()

This is in the reporting service log: http://pastebin.com/qm8FLzrn

Fixed by removing ports from SPNs.

Thanks to Alen at Microsoft.