The operation Elements cannot accept the arguments Issue with CloudDB

MIT App Inventor Help
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1

Hello Everyone
I was creating a food delivery app and used cloudDB to take the input of users to store it in a list view . But I got this error message. The operation Elements cannot accept the arguments["List"]. I am attaching a copy of my code. Please get back to me as soon as possible.

erroe
erroe1094×501 99.4 KB

2

Unable to view your blocks properly

3

Export your .aia file and upload it here.

export_and_upload_aia
export_and_upload_aia1255×551 2.89 MB

4

Here is a wild guess, to tide you over until you can post source code:

When appending to a CloudDB list, be sure that the value for that tag has been initialized to a list.

P.S. I would avoid using tags like "List", to avoid collisions with reserved words. Any way, list of WHAT?