Object of type 'NoneType' has no len()

How to fix this error ?

Welcome to the community @apulikkal,

Do you use more than one language in your form?

A quick scan in the forum suggests this issue might be coming from using one language in the form but adding ::LANGUAGE to your labes and names.

Hope this solves your issue, if it doesn’t please let us know so the community will help you further.

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@apulikkal, would you also mind sharing the screenshot with the community?