Why can’t I open the app in Play Store after updating it?

Good day!

When I first install the app, it can be opened in Play Store,
but after updating it, it cannot be opened in Play Store.

Que

Of course, the app has been updated normally.
After back-pressing, it can be opened by pressing the app icon.

What is the reason and what blocks should I add?

Without any more information it is hard to tell.

What happens when you press the button in the Play Store?

I uploaded an image of the blocks.

What happens when you press the button in the Play Store?
-> Nothing happened.

It is the version code of the new app to be updated.
If the version code of the new app is bigger than that of the current app, an update is performed.
The update is being performed without any problems.

What about TinyDB.GetValue_valueFlagNotThere? It should not be an empty string because comparing an empty string with a number will give an error.

We need to see all relevant blocks.

There is no possibility of an 'empty string' occurring.
App_ver_code was already saved in TinyDB when screen1 initialized.