Title: Genesis Error Occurring for Some Users with Identical Access Rights

This also might help your investigations.  In my experience issues like the one you have arise when, for example the default value on a parameter is updated or the parameter itself is unresolved.  A good way to demystify is to Reset Parameter Selections (you can do this from Genesis, for example) in the Windows Client Application.  This would need to be completed by all users impacted (as well as investigating root cause as above)