Bad arguments to add items to list?

Hi! I am new to App Inventor and I am trying to build an screen that acts as a schedule where one can add events and they will appear on list viewer. I created it last night and it seemed to work fine. Today I accidentally backtracked and deleted some code. I do not know how to fix this, I get a notification (shown below)
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Please help, this is my current code ( user must enter event details to add to list viewer) Thanks! Let me know if you need more information

(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.

export_and_upload_aia

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This is what the screen looks like on my phone! It is suppose to be for softball games/practice. (entered values are just for testing/example)

the .aia link:
HomeBase_copy.aia (243.1 KB)

(Canned Reply: ABG - Download those blocks and post them here)

Please download and post each of those event block(s)/procedures here ...
P.S. These blocks can be dragged directly into your Blocks Editor workspace.

See Download Block Images for a demo.

ignore the other screens sorry it is under "calendar"





blocks (4)

it looks your eventData is contaminated by bad data from tinyDB, try call TinyDB.ClearAll.

1 Like

This fixed the issue, but now the data is not appearing in the listviewer (elements) Does anyone know how to fix?

Add new data?

Sorry I worded that wrong! I meant I keep adding new data and it is not appearing on the listviewer. How might I fix that?

image
I see mine.

Try applying Do It to the global
image

I see two possibilities:

You have white background for the ListView, but its text has reverted to white ink, making it invisible?

Your screen is scrollable. Maybe the ListView is out of view?

By The Way, why do you test for some components Disabled, when you never disable or enable them?

I'm sorry, I do not really understand what you mean when you say "Do it?" Can you maybe specify? Thank you.

See the first link.

oh let me check the other stuff out thank you

It worked!!! Thank you very much for your help, I really appreciate it.

What was it?