Error only with Project Manager task

User logs in, tries to open Project Manager and the following errors appear
( please note, if user logs in at another workstation, it works fine )

Application Error
Exception caught in: mscorlib
Error Detail

Message: The given key was not present in the dictionary.
Program: CommonLanguageRuntimeLibrary
Method: get_Item
Client Stack Trace

==================
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Erp.UI.App.ProjectEntry.Transaction.TransactionLoad()
at Ice.Lib.Framework.EpiTransaction.createTransaction()

After hitting OK this error appears…

Application Error
Error Detail

Message: Cannot access this menu item: Project Entry
Inner Exception Message: The given key was not present in the dictionary.
Program:
Method:
Inner Exception

===============

The given key was not present in the dictionary.

at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Erp.UI.App.ProjectEntry.Transaction.TransactionLoad()
at Ice.Lib.Framework.EpiTransaction.createTransaction()
at Ice.Lib.Framework.EpiTransaction…ctor(Object Sender)
at Erp.UI.App.ProjectEntry.Transaction…ctor(Object Sender)
at Ice.Lib.App.Launch.InitializeLaunch()
at Ice.Lib.Framework.EpiBaseLaunch.lShow(Object args, DataSet dsMenuItem)
at Ice.Lib.Framework.FormFunctions.Launch(Session session, DataRow menuRow, Object lfo)
at Ice.Lib.Startup.LaunchUIApp(MenuRow menuRow, Session session, Form& form, Object lfo)

@rfarrar74
Try after deleting the Epicor client cache folder

Update -

Removing and reinstalling the Client fixed the issue.