Why would my app suddenly start wanting a .resources file?

Question

I made a change in my forms based C# app where I changed some dialogs to no longer handle multiple locales for the resources (gave up on translating all the text). Since doing that, the app now does not load because it says (FUSLOGVW):

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll
Running under executable  C:\Program Files\Microsoft Office\root\Office16\WINWORD.EXE
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: DisplayName = AutoTagCore.resources, Version=16.1.73.0, Culture=en-US, PublicKeyToken=200c326bc129ca1f
 (Fully-specified)
LOG: Appbase = file:///C:/Program Files/Windward Studios/Windward Report Designer/
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = NULL
Calling assembly : AutoTagCore, Version=16.1.73.0, Culture=neutral, PublicKeyToken=200c326bc129ca1f.

What/why would it be building and then requiring a .resources file?

thanks - dave