Updated MYOB and now it won't start up

Question

I've restarted many times and rebooted my laptop a couple of times - help!

AccountRight Application Error Report
=====================================
Application Version: 2025.11.1.3
Application File Version: 2025.11.1.6
Incident Id: 935e113a-ca1b-4704-8f57-52d1c8e3383c
Time: Thursday, 11 December 2025 11:11:48 AM

Code:
System.NullReferenceException

Message:
Object reference not set to an instance of an object.

Stack Trace
----------------------------------------
1 : System.NullReferenceException
----------------------------------------
System.NullReferenceException: Object reference not set to an instance of an object.
at Huxley.UI.Forms!0x0600330a!MYOB.Huxley.UI.Forms.BaseForms.BaseViewForm.Dispose(Boolean disposing) +0xcb
at System!0x06003202!System.ComponentModel.Component.Finalize() +0x0
==========
MODULE: Huxley.UI.Forms => Huxley.UI.Forms, Version=2025.11.1.3, Culture=neutral, PublicKeyToken=947f70fecdd4159f; G:ccf2921d62e34fc8be2831bcba1470b5; A:1
MODULE: System => System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089; G:b28fd2ac16164cb48d81dedd915664dc; A:2

carolduncan · Answer

I’ve spoken with our IT people and they’ve fixed it for us. They told me -
The issue was additional DLLs in the MYOB application folder. We use App Control for Business (AppLocker). The new DLLs use a new (different) developer certificate and were not on the whitelist. The particular DLL identified is IdentityModel.OidcClient.dll (but this is one of a bunch of random developer certificates used in this application - not uncommon, but quite difficult to manage given the regular updating patterns!).

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Updated MYOB and now it won't start up

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