Data Table Problem

Widgets & Design

We are encountering a runtime error when using a Data Table widget in FlutterFlow. The error message shown is:
“Unexpected null value. The relevant error-causing widget was: Builder.”

This issue occurs even though the data is correctly loaded and validated (i.e., null checks and default fallbacks like ?? "N/A" are already in place). The table displays partially, but the error panel shows a red exception related to a null reference during the build phase.

The affected page uses dynamic data fetched from a backend (Firebase or API), and it renders a list of records with multiple columns, including checkboxes and text descriptions.

What have you tried so far?

Verified that all the data fields being accessed are non-null using null-aware operators (??) and conditionals.
Wrapped dynamic fields in try-catch blocks and conditional rendering.
Replaced forced unwraps (!) with null-safe expressions.
Checked that the data source is fully loaded before building the table (using loaded, isNotEmpty, etc.).
Removed and recreated the Builder block, thinking it could be a temporary widget corruption.
Re-tested in a new clean project environment.

Despite these steps, the error persists only within the Data Table using Builder, even with valid and non-null data.

Did you check FlutterFlow's Documentation for this topic?

Yes

3

2 replies