We could see this on customers running our app with Access 2016, 2013 and also those using Access out of Microsoft 365 (here Version 2206 brings in this behaviour).
Dramatically as we talk about more than 1000 computers in Europe and Asia!
If you set Options , aktive database, open form on startup to "no form" (all translated, english might be different in Office) It works.
However in most cases the startform will call procedures for connection, login... so not posisble to do.
We found a dependency to form complexity. A simple form in open event only a message box works. But if in open a call for functions in modules exists, the error comes up.
Latest workarround: simple form in options, on simple form a button to call the original start form. Test in the smaller app with Microsoft 365 Access was acceptable. simple form opend and on click opened the real form. However we noticed if you click immediately after form is visible you get the error and have to click twice.