System.nullReferenceException: attempt to use an object that has been deleted - when running edit report to post grants

This issue can be caused by a variety of reasons:

1. The FIMS shortcut is not setup correctly on the workstation, please see the following article:
How do I create a FIMS shortcut on a workstation, terminal server or the database server?

2. The workstation was not set up correctly using a Windows account that has admin rights, please see the following article:
How do I setup FIMS on a Workstation?

3. The wrong version of .Net or Visual Studio was installed on the workstation, FIMS requires Microsoft .NET v2.0.50727. Running netsetup under an admin account will install the correct version of .Net and Visual Studio:
How do I setup FIMS on a Workstation?

4. You also need to be able to right-click and run FIMS as admin, you may get the following message when doing that. Please review the following article with the solution. Your IT staff should be able to assist with these steps:
Unable to Open Message File PROMSGS when Right Clicking and Running FIMS as Administrator