Suddenly several VBA macro errors, mostly 32809

Question

Suddenly my excel file is generating a lot of errors at startup.
No changes have been made to the file since before the errors started.

Example of errors:

Answer 1

We found success using the following approach.

1. Open a blank version of excel.
2. Disable ActiveX controls in Excel Options.

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3. Open the offending file. (Click through any error received upon open)
4. Save the file as a new name.
5. Activate ActiveX controls.

We found distributing this file after the steps above resolved the error for all users.

Hope this helps someone else.